The 50 Hottest Cities in America

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A brutal heat wave is scorching the American Southwest. Temperatures in Phoenix may climb to 113 degrees Fahrenheit on Tuesday. This would be the 57th day temperatures have exceeded 100 in Phoenix this year. Phoenix first topped 100 this year on April 26.

There is no relief in sight — the National Weather Service posted an excessive heat warning Tuesday until 8 p.m. Aug. 21. The daily highs are forecast to top 100 degrees through at least Saturday, Aug. 24. 

To find the U.S. cities that report the most days a year with exceptionally high temperatures, 24/7 Wall St. reviewed data from the National Oceanic Atmospheric Administration (NOAA).

Click here to see America’s hottest cities.
Click here to see the methodology.

Phoenix daytime temperatures have set record highs far more often than they have record lows in each of the past five decades. The future looks even hotter for Phoenix. According to a report last week from the Union of Concerned Scientists, Phoenix’s historical average number of days from April through October with a heat index of 105 or more is 16 (the heat index is a non-standardized measure of the combination of heat and humidity). The report says cities in the Sun Belt will likely face more frequent days with a heat index around 105 in the later part of the century.

Besides the Southwest, climate change is not sparing other regions of the nation. From the Everglades in Florida to Glacier National Park in Montana, climate change is having a severe impact on popular tourist draws. Here are the attractions that are being destroyed by climate change.

Heat kills more people in the United States, over a 30-year average, than any other natural hazard, according to the National Weather Service. Tornadoes and floods are other natural events that have exacted a deadly toll in the United States. Preparedness for such natural disasters varies from state to state. Here are the best and worst prepared states for weather emergencies.