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Heat Waves

Online 27.1: Apparent Temperatures (Heat Index) from 10 to 16 July 2001: Maps of apparent temperature during the heat wave of July 2001. Higher apparent temperatures are red in color. The most intense heat fluctuates with the diurnal cycle of solar heating, and moves east with a bull's eye of 120° F forming over the Chicago - Milwaukee region on 13 July.

Data courtesy of NCEP

Online 27.2: 4 PM CDT Temperatures for 1 to 31 August, 2000: A sequence of mid-afternoon surface temperatures illustrating extreme heat in the Southern Plains. Temperatures in excess of 95° F persist over Texas and Oklahoma for the entire month of August.

Courtesy of Dept. Atmospheric Sciences, University of Illinois at Urbana-Champaign

Related Web Sites
Heat Wave Awareness Project Learn more about how you can protect yourself from extreme heat
Fact Sheet on Extreme Heat from FEMA Learn what you should do before and during conditions on extreme heat
Heat Index Forecasts Examine forecasts of the probability of extreme heat in the near future
Trends in Extreme Heat Are there more heat waves in the U.S. in recent history? Learn the answer in this NOAA discussion

Department of Atmospheric Sciences Severe and Hazardous Weather at Department of Atmospheric Sciences University of Illinois
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