Extreme Heat. Self-help measures and tips from the CDC for dealing with periods of extreme heat.
During a Heat Emergency. Advice from FEMA on what you should do if the weather is extremely hot.
Heat Wave: A Major Summer Killer. This National Weather Service publication explains what the heat index is and ways to protect yourself from extreme heat.
Heat Waves. From the American Red Cross, an information fact sheet on what to do before, during and after a heat wave.