{{ message }}

United States

{{ message }}

Flamingo Las Vegas Hotel & Casino
Flamingo Las Vegas Hotel & Casino - dream vacation

3555 Las Vegas Boulevard South, Las Vegas

Hotel Pennsylvania New York
Hotel Pennsylvania New York - dream vacation

401 7th Avenue at 33rd Street, New York City

The United States of America (USA), commonly known as the United States (U.S.) or America, is a constitutional federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions. Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The state of Hawaii is an archipelago in the mid-Pacific Ocean. The U.S. territories are scattered about the Pacific Ocean and the Caribbean Sea. Nine time zones are covered. The geography, climate and wildlife of the country are extremely diverse.

At 3.8 million square miles (9.8 million km2) and with over 324 million people, the United States is the world's third- or fourth-largest country by total area, third-largest by land area, and the third-most populous. It is one of the world's most ethnically diverse and multicultural nations, and is home to the world's largest immigrant population. The capital is Washington, D.C., and the largest city is New York City; nine other major metropolitan areas—each with at least 4.5 million inhabitants and the largest having more than 13 million people—are Los AngelesChicagoDallasHoustonPhiladelphiaMiamiAtlantaBoston, and San Francisco.

Paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century. The United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the colonies following the Seven Years' War led to the American Revolution, which began in 1775. On July 4, 1776, during the course of the American Revolutionary War, the colonies unanimously adopted the Declaration of Independence. The war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, adopted in 1781, were felt to have provided inadequate federal powers. The first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties.

The United States embarked on a vigorous expansion across North America throughout the 19th century, displacing Native American tribes, acquiring new territories, and gradually admitting new states until it spanned the continent by 1848. During the second half of the 19th century, the American Civil War led to the end of legal slavery in the country. By the end of that century, the United States extended into the Pacific Ocean, and its economy, driven in large part by the Industrial Revolution, began to soar. The Spanish–American War and World War I confirmed the country's status as a global military power. The United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, and a permanent member of the United Nations Security Council. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the world's sole superpower. The U.S. is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States (OAS), and other international organizations.

The United States is a highly developed country, with the world's largest economy by nominal GDP and second-largest economy by PPP. It ranks highly in several measures of socioeconomic performance, including average wage, human development, per capita GDP, and productivity per person. While the U.S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the manufacturing sector remains the second-largest in the world. Though its population is only 4.3% of the world total, the United States accounts for nearly a quarter of world GDP and over a third of global military spending, making it the world's foremost economic and military power. The United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations.

The Amateur Traveler talks to Brad Hugg soon to be the host of the Colorado Podcast about his state. He talks about the citieson teh frontal range and gives us a great circle route that takes in 14ers (peaks over 14 thousand feet), huge sand dunes, buttes, Mesa Verde, and the ski resorts near the continental divide.
The Amateur Traveler talks to Margot about Acadia National Park in Maine. Margot has been going to Acadia since she was a little girl to hike, bike, kayak, and connect with the beauty of this beautiful area. She talks about the sights, the seafood, the Maine people and why you should not go blueberry picking with her grandfather.
The Amateur Traveler talks to Christine who comes to tell us that Wisconsin has more to offer than just visiting my relatives. She starts us on a tour of the state from the college town and capital of Madison with its street fairs, concerts and capital building. We hear about the influence of Wisconsin born architect Frank Lloyd Wright who founded his school of architecture at nearby Taliesin. We enjoy the bike paths, breweries, badgers football and burial mounds. The we move on to Milwaukee with its neighborhoods, breweries and of course baseball. We stop in Kohler and then head up Wisconsin’s “thumb” to Door county. After visiting Green Bay and the home of the Packers we head up to the north woods with its many small lakes and Lake Superior with its one very big one. We wrap up by winding down the Mississippi river. Think there is nothing to see in Wisconsin? Think again.
The Amateur Traveler talks to Nancy Sathre-Vogel from FamilyOnBikes.com about their odyssey – a bike ride with two young boys along the length of the Pan-American highway from Alaska to the southern end of South America. Learn why they did this trip, how they have managed it and what they have learned along the way.

The Amateur Traveler talks again to Jason and Janie about their hometown of Charlottesville, Virginia. Charlottesville was has deep historic roots and the homes of Presidents Jefferson and Madison with the home of Monroe close by as well. Charlottesville is also the home of the University of Virginia and Thomas Jefferson was more proud of founding the institution than of being president. The area is now the home to numerous wineries and numerous restaurants and hosts a thriving food culture. Charlottesville is also a gateway to the Shenandoah Valley as well as other areas for hiking and outdoor activities.

The Amateur Traveler talks to Erik Smith again about his trip to the Four Corners area in the American southwest. Four Corners is the spot where 4 U.S. states meet: Utah, Arizona, New Mexico and Colorado. While the Four Corners spot itself is just a photo op (an probably at the wrong place), the area around it contains some amazing scenery and historic sites. Erik gives us a state by state break down of the area. He tells us about National Parks nearby like Arches Canyonlands, Hovenweep, Moab, Canyon de Chelly, Rainbow Bridge, Mesa Verde , Chaco Culture, Black Canyon of the Gunnison, Petrified Forest and Aztec Ruins. The area also boats the spectacular and iconic scenery of Monument Valley and a stretch of road known as the “Million Dollar Highway”. It has many Native American sites including those like Canyon de Chelly run jointly by the Navajo nation and the U.S.

The Amateur Traveler talks to Kirk Horsted in a two part episode on the Twin Cities of Minneapolis and Saint Paul, Minnesota. In this second half Kirk looks at the state capital of Saint Paul, Minnesota.

The Amateur Traveler talks to Jen Russell about the 3rd smallest state in the U.S. Connecticut. Connecticut, the Constitution State, is located halfway between New York and Boston. It has a coastline sheltered by Long Island so more suitable for family frolicking than for surfing. Connecticut also has a long maritime tradition which is celebrated at Mystic Seaport. It's forested rolling hills are popular with people who come to New England in the Fall to see the Fall colors. Connecticut is rich in U.S. history producing people such Revolutionary War patriot Nathan Hale ("My only regret is that I have but one life to give to my country"). It is rich in natural history as evidenced by Dinosaur State Park.

Hear about travel to Santa Fe, New Mexico as the Amateur Traveler talks to Billie Frank from SantaFeTravelers.com about her city, the second oldest in the United States and the oldest capital city in the U.S.

Hear about travel to Azerbaijan as the Amateur Traveler talks to Mason Wiley of Community Based Tourism Azerbaijan about his time spent in the country during the Peace Corps. Even though he has come back to the USA he still loves and misses Azerbaijan and its people. Mason had not even heard of Azerbaijan until he was posted there by the Peace Corps.

Road Atlas 2017: Large Scale

Rand McNally

2017 Large Scale Road AtlasOverviewGive road-weary eyes a break with this spiral-bound Large Scale edition featuring all the accuracy you've come to expect from Rand McNally, only bigger. Updated atlas contains maps of every U.S. state that are 35% larger than the standard atlas version plus over 350 detailed city inset and national park maps and a comprehensive, unabridged index. Road construction and conditions contact information for every state conveniently located above the maps. Contains mileage chart showing distances between 77 North American cities and national parks with driving times map. Tough spiral binding allows the book to lay open easily.Other FeaturesBest of the Road® - Our editor's favorite road trips from our Best of the Road® collection follows scenic routes along stretches of coastline, both east and west, to forests mountains, and prairies; and through small towns and big cities. For a weekend or a week there's something for everyone.Tell Rand! As much as we work to keep our atlases up to date, conditions change quickly and new construction projects begin frequently. If you know of something we haven't captured in our atlas, let us know at randmcnally.com/tellrand.Tourism websites and phone numbers for every U.S. state and Canadian province on map pages

Rand McNally Signature Map of the United States

Rand McNally

Updated and redesigned, Rand McNally's Signature United State wall map features eye-catching bold and vivid colors that make this the perfect reference piece sure to stand out in any home, classroom or office. The precise detail and digital accuracy shows color-matching relief and other physical features without sacrificing the maps readability. Printed on high quality paper. U.S. FeaturesState capitals, national parks and time zones clearly markedColor-matching relief shows mountain ranges and other elevation changesClearly labeled state and city names for easy locationFolded MapProduct dimension: 50" x 32"

National Geographic Kids United States Atlas

National Geographic

The award-winning National Geographic Kids United States Atlas features lively maps, and graphics; updated essays and statistics; 8 thematic map spreads, on topics such as immigration, natural hazards, the water crisis, and the "greening" of America; same-size physical and political maps for each region for easy comparison; vibrant photo essays on each region and state; more than 350 full-color illustrations; 80-plus pages of National Geographic maps; 50-plus info graphics; updated state fact boxes; geo-whiz facts; state flags, birds, and flowers; comprehensive place-name index with coordinates for easy reference; and glossary of geographic terms.      Just like its companion volume National Geographic Kids World Atlas, the USA atlas is INTERACTIVE. A specially designed Web site will allow kids to link directly to hundreds of National Geographic maps, photographs, and articles plus videos, music, games, and more that will expand their knowledge and perspective about this country and its states and regions. All maps are custom-designed for middle-grade students by the Society's world-famous cartographers and each is shown in the context of surrounding areas. Throughout, locator maps and color coding make it easy for kids to keep track of where they are and to quickly navigate from region to region and state to state.     The combination of large, detailed, yet easy-to-read maps--both physical and political; stunning, full-color photo essays; information-packed thematic spreads; and the interactive component sets this atlas apart from every other U.S. atlas currently available for the 8­-12 age market and makes it an invaluable resource.

Rand McNally 2017 Road Atlas (Rand Mcnally Road Atlas: United States, Canada, Mexico)

Rand McNally

2017 Road AtlasOverviewThe Rand McNally Road Atlas is the most trusted and best-selling US atlas on the market. This updated North American atlas contains maps of every U.S. state and Canadian province, an overview map of Mexico, and detailed inset maps of over 350 cities and 20 U.S. national parks. Road construction and conditions contact information for every state conveniently located above the maps. Contains mileage chart showing distances between 90 North American cities and national parks along with a driving times map. Other FeaturesBest of the Road® - Our editor's favorite road trips from our Best of the Road® collection follows scenic routes along stretches of coastline, both east and west, to forests mountains, and prairies; and through small towns and big cities. For a weekend or a week there s something for everyone.Tell Rand! As much as we work to keep our atlases up to date, conditions change quickly and new construction projects begin frequently. If you know of something we haven't captured in our atlas, let us know at randmcnally.com/tellrand.Tourism websites and phone numbers for every U.S. state and Canadian province on map pages

Rand McNally United States Map

Rand McNally

Rand McNally's United States folded map features clear, easy-to-read cartography showing all Interstate and U.S. highways, along with clearly indicated cities, points of interest, airports, boundaries, and more. Rand McNally folded maps have been the trusted standard for years, offering unbeatable accuracy and reliability at a great price. Interstate and U.S. highwaysIndications of cities, points of interest, airports, boundaries, and moreMileage chartMileage & driving times mapNational facts and symbolsToll roads chartUnited States physical mapVisitor information

Rand McNally Western United States Regional Map

Rand McNally

Rand McNally's folded map featuring the Western United States is a must-have for anyone traveling in and around this part of the country, offering unbeatable accuracy and reliability at a great price. Our trusted cartography shows all Interstate, state, and county highways, along with clearly indicated points of interest, airports, county boundaries, and more. You'll see why Rand McNally folded maps have been the trusted standard for years. Regularly updated, full-color mapsClearly labeled Interstate, U.S., state, and county highwaysDetail maps of major cities, a mileage chart, and a Mileages & Driving Times MapIndications of parks, points of interest, airports, county boundaries, and moreEasy-to-use legend Detailed index Convenient folded sizeStates covered: Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming

National Geographic Guide to National Parks of the United States, 8th Edition (National Geographic Guide to the National Parks of the United States)

National Geographic

In time for the National Park's 100th birthday, this flagship, best-selling guide is fully revamped and updated with all new text, photographs, and design. National Geographic writers hit all 59 national parks—including Pinnacles, the newest in the crown—for intensive on-the-ground research. 300 photos and 80 colorful maps complete the extraordinary package. Practical and comprehensive coverage includes engaging, individual park descriptions and brief history, travel planning tips, itineraries and directions, activities, park lodges and hotels, visitor center contact information, and camping information. Well-known national parks writers provide new insights into the parks and share favorite spots for viewing scenery, wildlife, sunsets, and more in this Centennial edition.

DK Eyewitness Travel Guide USA

DK

Explore the beautiful USA. From the Empire State Building to the Golden Gate bridge, this DK travel guide has you covered and will take you to the best places in the United States.

From top restaurants, bars, and clubs to standout scenic sites and walks, our insider tips are sure to make your trip outstanding. Whether you're looking for unique and interesting shops and markets, or seeking the best venues for music and nightlife, we have entertainment and hotel recommendations for every budget covered in our Eyewitness Travel Guide.

Discover DK Eyewitness Travel Guide: USA.

   • Detailed itineraries and "don't-miss" destination highlights at a glance.    • Illustrated cutaway 3-D drawings of important sights.    • Floor plans and guided visitor information for major museums.    • Guided walking tours, local drink and dining specialties to try, things to do, and places to eat, drink, and shop by area.    • Area maps marked with sights.    • Detailed city maps include street finder indexes for easy navigation.    • Insights into history and culture to help you understand the stories behind the sights.    • Hotel and restaurant listings highlight DK Choice special recommendations.

With hundreds of full-color photographs, hand-drawn illustrations, and custom maps that illuminate every page, DK Eyewitness Travel Guide: USA truly shows you the US like no one else can.

Series Overview: For more than two decades, DK Eyewitness Travel Guides have helped travelers experience the world through the history, art, architecture, and culture of their destinations. Expert travel writers and researchers provide independent editorial advice, recommendations, and reviews. With guidebooks to hundreds of places around the globe available in print and digital formats, DK Eyewitness Travel Guides show travelers how they can discover more.

DK Eyewitness Travel Guides: the most maps, photographs, and illustrations of any guide. Visit TravelDK.com to learn more.

Exercise normal security precautions

The decision to travel is your responsibility. You are also responsible for your personal safety abroad. The purpose of this Travel Advice is to provide up-to-date information to enable you to make well-informed decisions.

Crime

The possession of firearms and the frequency of violent crime are generally more prevalent than in Canada. Within large metropolitan areas, violent crime more commonly occurs in economically disadvantaged neighbourhoods, particularly from dusk to dawn. Verify official neighbourhood crime statistics before planning an outing.

Robbery and assault can also occur in wealthy residential or commercial districts. Exercise caution, particularly at night. Violent crimes, particularly assault, are often connected to alcohol and drug consumption. Remain alert and discreet while in entertainment areas.

Canadians have been the victims of crime such as break-ins, assaults and pickpocketing in the Miami area, sometimes during daylight hours. Theft occurs in the North Miami Beach area, at South Beach and at airports, particularly from trunks of parked cars. Be alert, as criminals use a variety of techniques to steal personal belongings.

Passport theft is on the rise. Ensure that your travel documents are secure at all times.

Driving to Mexico

Foreign Affairs, Trade and Development Canada currently advises against non-essential travel to the Mexican side of the border region with the U.S., and does not recommend crossing the U.S.-Mexico border by car, due to continuously high levels of violence linked to organized crime in those areas. For more information on travel to Mexico, please consult our Travel Advice for Mexico.

Air travel

Consult our Transportation Safety page in order to verify if national airlines meet safety standards.

Health

Related Travel Health Notices
Consult a health care provider or visit a travel health clinic preferably six weeks before you travel.
Vaccines

Routine Vaccines

Be sure that your routine vaccines are up-to-date regardless of your travel destination.

Vaccines to Consider

You may be at risk for these vaccine-preventable diseases while travelling in this country. Talk to your travel health provider about which ones are right for you.

Hepatitis B

Hepatitis B is a disease of the liver spread through blood or other bodily fluids. Travellers who may be exposed (e.g., through sexual contact, medical treatment or occupational exposure) should get vaccinated.

Influenza

Seasonal influenza occurs worldwide. The flu season usually runs from November to April in the northern hemisphere, between April and October in the southern hemisphere and year round in the tropics. Influenza (flu) is caused by a virus spread from person to person when they cough or sneeze or through personal contact with unwashed hands. Get the flu shot.

Measles

Measles occurs worldwide but is a common disease in developing countries, particularly in parts of Africa and Asia. Measles is a highly contagious disease. Be sure your vaccination against measles is up-to-date regardless of the travel destination.
 

Yellow Fever Vaccination

Yellow fever is a disease caused by the bite of an infected mosquito.

Travellers get vaccinated either because it is required to enter a country or because it is recommended for their protection.

* It is important to note that country entry requirements may not reflect your risk of yellow fever at your destination. It is recommended that you contact the nearest diplomatic or consular office of the destination(s) you will be visiting to verify any additional entry requirements.
Risk
  • There is no risk of yellow fever in this country.
Country Entry Requirement*
  • Proof of vaccination is not required to enter this country.
Recommendation
  • Vaccination is not recommended.
Food/Water

Food and Water-borne Diseases

Travellers to any destination in the world can develop travellers' diarrhea from consuming contaminated water or food.

Practise safe food and water precautions while travelling in North America. When in doubt, remember…boil it, cook it, peel it, or leave it!


Insects

Insects and Illness

In some areas in North America, certain insects carry and spread diseases like Lyme disease and West Nile virus.

Travellers are advised to take precautions against bites.


Malaria

Malaria

There is no risk of malaria in this country.


Animals

Animals and Illness

Travellers are cautioned to avoid contact with animals, including dogs, snakes, rodents, birds, and bats. Certain infections found in North America, like rabies, can be shared between humans and animals.


Person-to-Person

Person-to-Person Infections

Crowded conditions can increase your risk of certain illnesses. Remember to wash your hands often and practice proper cough and sneeze etiquette to avoid colds, the flu and other illnesses.

Sexually transmitted infections (STIs) and HIV are spread through blood and bodily fluids; practise safer sex.


Medical services and facilities

Medical services and facilities

All hospitals must accept and treat emergencies, regardless of the person’s ability to pay. Clients will, however, be charged for all services rendered.

Keep in Mind...

The decision to travel is the sole responsibility of the traveller. The traveller is also responsible for his or her own personal safety.

Be prepared. Do not expect medical services to be the same as in Canada. Pack a travel health kit, especially if you will be travelling away from major city centres.

You are subject to local laws. Consult our Arrest and Detention page for more information.

Illegal and prescription drugs

The U.S. zero tolerance policy imposes severe penalties for the possession of even a small amount of an illegal drug.

Even prescription drugs and syringes used for legitimate medical purposes come under intense scrutiny. Carrying medicines in their original containers and carrying a duplicate of your original prescription, listing both the generic and trade names of the drug, is recommended. Never carry a package or luggage for someone else unless you have been able to verify the contents completely.

Personal medication may be subject to U.S. drug importation laws and regulations. In general, personal importation of a 90-day supply of medication is allowed, but only if the drug is not available in the U.S. Prescription drugs imported through the mail from Canada are carefully scrutinized. For further information, please consult the U.S. Food and Drug Administration.

Laws

A serious violation of the law may lead to a jail sentence or, in some states, a death sentence. The jail sentence will be served in a local prison. Canada and the U.S. do, however, have a treaty that permits a Canadian imprisoned in the U.S. to request a transfer to Canada to complete the sentence in a Canadian prison. The transfer requires the agreement of both Canadian and American authorities. Canadian citizenship confers no immunity, special protection or rights to preferential treatment.

Imports and exports

A non-resident may bring merchandise worth up to US$200 free of duty for personal or household use into the U.S. On visits of 72 hours or more, you may carry an additional US$100 worth of merchandise free of duty as gifts for other people. Certain items are prohibited. More information is available from the U.S. CBP.

For information on personal duty purchase exemptions at the border when returning to Canada, please consult the Canada Border Services Agency.

Travel to Cuba

Residents of the U.S., including Canadian citizens, are subject to U.S. law regarding travel to Cuba. They are prohibited from spending money (in any currency) relating to Cuban travel unless they are licensed by the Office of Foreign Assets Control (OFAC).

Pets

When examined at a port of entry, cats and dogs must show no signs of diseases communicable to humans. If there is evidence of poor animal health, an examination by a licensed veterinarian might be required, at the expense of the owner. The U.S. authorities may also require a health certificate. Vaccination against rabies is not required for cats. Dogs must be vaccinated against rabies at least 30 days before entry, except for puppies under three months of age. Other animals are also subject to controls or quarantine requirements. Additional information is available from the U.S. CBP and local authorities.

When you return to Canada, the Canadian Food Inspection Agency will require proof of vaccination against rabies for all cats and dogs over three months of age. For detailed information, contact the Canadian Food Inspection Agency.

Automobile insurance

If you are entering the U.S. by personal automobile, you should check with your insurance agent to verify that your existing coverage is valid or sufficient for the areas you will be visiting and for the duration of your visit. If you are going to remain in a specific location in the U.S. for a considerable period of time, verify with the local authorities that your vehicle registration and driver’s licence will remain valid.

Many states have mandatory automobile insurance requirements, and many require motorists to carry appropriate proof of insurance. Each state’s motor vehicles department can give you more specific information. The American Automobile Association and the Canadian Automobile Association can provide detailed information to their members.

If you are in the U.S. and wish to drive to Mexico in your personal vehicle, you may need to purchase liability insurance as well as additional auto insurance. Contact your insurance agent and the local Mexican tourist office for further information. See our Travel Advice and Advisories for Mexico.

Hitchhiking

Never cross the border with a hitchhiker or as a hitchhiker. Though you may not be carrying anything illegal, the hitchhiker in your vehicle might be, and you could be implicated.

Be equally careful about who and what you carry in your vehicle. As the driver, you could be held responsible for the misdeeds of your passengers, even if committed without your knowledge or involvement.

Money

The currency is the U.S. dollar (USD). Canadian currency, traveller’s cheques in Canadian dollars, and personal cheques drawn on Canadian banks are not widely accepted or easily negotiable in the U.S. All major credit cards are accepted throughout the U.S.

There are banking machines that will accept Canadian bank cards, but these may be limited depending on your account access. Despite these difficulties, do not carry large amounts of cash. Non-U.S. residents generally cannot negotiate monetary bank instruments (international bank drafts, money orders, etc.) without having a U.S. bank account.

There is no limit to the amount of money that you may legally take into or out of the U.S.. However, if you carry more than US$10,000 in monetary instruments (such as U.S. or foreign coin, currency, traveller’s cheques, money orders, stocks or bonds) into or out of the U.S., or if you receive more than that amount while in the U.S., you must file a report (Customs Form 4790) with U.S. Customs. Failure to comply can result in civil and criminal penalties, including seizure of the currency or monetary instruments.

Climate

Hurricane season

The hurricane season extends from June to the end of November, in the southeastern states. Consult the website of the National Hurricane Center for additional information on weather conditions, stay informed of regional weather forecasts, and follow the advice and instructions of local authorities.

Volcanoes, tornadoes and earthquakes

Some volcanoes in the U.S. are active and seismic activity also occurs. For up-to-date information on volcanic activity, consult the Alaska Volcano Observatory’s website. Additional information on volcanic and seismic activity in the U.S., as well as on possible tsunami threats to Pacific states, is available from the U.S. Geological Survey. Consult the National Oceanic and Atmospheric Administration's National Weather Service for information on tornadoes. You should know the address and telephone number of the nearest embassy or consulate general of Canada in the event of an emergency.

Wildfires

Hot, dry weather conditions and strong winds often lead to wildfires during the summer. Remain alert to local developments through the media and modify your travel arrangements accordingly. In the event of a wildfire, follow the advice of local authorities. If you suffer from respiratory ailments, take into account that the air quality in areas near active fires may deteriorate due to heavy smoke.