Four states are at risk for extreme heat-related impacts on Thursday, according to a map by the National Weather Service (NWS ...

As part of the National Weather Service’s “Hazard Simplification Program,” Excessive Heat Watches and Excessive Heat Warnings ...

Residents of three U.S. cities have been warned to expect "extreme heat" through Wednesday that is likely to affect "most health systems, heat-sensitive industries and infrastructure," according ...

HOUSTON — Changes are being made to how heat alerts are relayed as part of the National Weather Service's Hazard Simplification project as we approach the warmer months of the year. Similar ...

Like it did with wind chill alerts in fall, the NWS is adjusting the names of its heat watch and warning alert. Instead, dangerous heat conditions will trigger an “Extreme Heat Watch” or an ...

The only heat alert that will remain the same is the heat advisory. While the wording used by the NWS has changed, the criteria will remain the same. The extreme heat watch will be issued within ...

In February 2025, an unrelenting high-pressure system sent temperatures soaring across South America. Rio de Janeiro sizzled ...

Heat islands can run 17 degrees F hotter than a city’s cooler areas. Studying them now may yield ideas for mitigating future warming. ByRyan Morris and Ryan Williams This story appears in the ...

The results from the largest single-day campaign to map urban heat in U.S. history charted temperatures using car-mounted censors, relying on over 150 volunteers to measure variability one hot day ...