Humidity and the abrupt onset of extremely high temperatures have killed thousands of people in India.
Image of the Day Heat
All-time national and regional records for summer temperatures have fallen several times in recent weeks.
This map depicts land surface temperature anomalies for July 20 to 27, 2011, in the midst of a month-long heatwave across much of the United States.
Image of the Day Heat Land Life Temperature Extremes
Image of the Day Heat Land Temperature Extremes
April temperatures soared far above normal, with one location in Thailand breaking the national record.
Extreme heat broke meteorological records, canceled flights, and made life miserable for millions of people.
Image of the Day Heat Land
Extreme temperatures baked northern cities for nearly three weeks.
Image of the Day Atmosphere Heat Land Drought Floods Severe Storms Human Presence Temperature Extremes
Temperature Extremes
India and Tibet were sweltering in early June, though the arrival of the monsoon provides some relief.
This color-coded map shows above- and below-normal temperatures in early July 2010, when a heat wave struck much of North America and Eurasia.
Image of the Day Land
In July 2003, Europe experienced an historic heat wave that killed at least 3,000 people.