U.S. officials prepare for another summer of extreme heat with help from heat maps.

Last summer, the U.S. faced triple-digit temperatures, and officials warn it could happen again as El Niño weakens, and La Niña takes its place. La Niña brings warmer water to Asia and drought in the Southwest U.S., predicting a hotter summer. The NOAA expects above-normal temperatures for most of the U.S., with increased heat domes. The Western U.S. may see below-normal rain while the East Coast and Alaska expect above-normal rainfall. Health officials caution that extreme heat can be dangerous, with vulnerable populations more at risk. The trend of record-breaking heat continues, necessitating preparation for future extreme heat events due to climate change.

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