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27 juin 2024 · These maps show changes in the number of heat waves per year (frequency); the average length of heat waves in days (duration); the number of days between the first and last heat wave of the year (season length); and how hot the heat waves were, compared with the local temperature threshold for defining a heat wave (intensity).
This indicator examines several characteristics of heat waves (also known as “extreme heat events”) across the contiguous United States over the last several decades. As average temperatures rise, scientists expect heat waves to become more frequent and intense (USGCRP, 2017).
27 juin 2016 · Extreme heat can lead to power outages as heavy demands for air conditioning strain the power grid, while extremely cold weather increases the need for heating fuel. Record-setting daily temperatures, heat waves, and cold spells are a natural part of day-to-day variation in weather.
1 nov. 2020 · As the Earth’s climate warms overall, however, heat waves are expected to become more frequent, longer, and more intense. 2,3 Higher heat index values (which combine temperature and humidity to describe perceived temperature) are expected to increase discomfort and aggravate health issues.
25 mars 2021 · Interactive versions of figures from the Climate Change Indicators website are available below. Use the tab menu to view different sets of indicators, or search for specific types of indicators with the filter menu.
These bar graphs and maps show changes in the number of heat waves per year (frequency) and the number of days between the first and last heat wave of the year (season length). These data were analyzed from 1961 to 2021 for 50 large U.S. metropolitan areas.
The indicator shows a peak in heat-related deaths in 2006, a year that was associated with widespread heat waves and was one of the hottest years on record in the contiguous 48 states (see the U.S. and Global Temperature indicator).
