Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

A heat dome​ is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service​ issuing heat alerts from Nebraska to Florida.

It’s the hottest time of the year in the United States and another heat dome is about to make millions of people feel every bit of it.

Heat dome will cause dangerously high temperatures in many places across the country this weekend, ... US Heat Wave Warnings: Live Tracker Maps. Published Jun 19, 2025 at 5:07 PM EDT Updated Jun ...

CNN is tracking extreme heat conditions for Americans each day. See where the risks are greatest — and where high temperature records might be broken.

Heat Advisory: Maps Show Where US Faces 'Dangerously Hot Conditions' Published Aug 02, 2024 at 7:32 AM EDT Updated Aug 02, 2024 at 8:21 AM EDT. By .

Over 64 million people in the United States from Iowa to Maine are under heat advisories. Here's how hot it feels near you Tuesday. ... US temperature, heat index map.

Cutting Industry Costs, Balancing Renewables. In 2022, U.S. industries used around 12,600 petajoules of combustible fuels (excluding feedstocks), almost all to deliver heat at temperatures below ...

The map embeds below identify areas where the heat index is forecasted to reach NWS-defined levels from "Caution" (80 degrees Fahrenheit) to "Extreme Danger" (above 125 degrees). More in U.S.