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Summary
Description1960- Annual average number of days spent in heat waves - US.svg
English: Chart showing average time spent in heat waves in the U.S. annually, aggregated by decade, based on the average number of heat waves per year in each decade and the average heat wave duration in each decade
Suggested caption: Over decades, the average number of days spent in heat waves in the U.S. annually has increased, based on increases in both the average annual number of heat waves and on their average durations.
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Chart showing average time spent in heat waves in the U.S. annually, aggregated by decade, based on the average number of heat waves per year in each decade and the average heat wave duration in each decade