A surge of summer heat is building across much of the United States. See the extreme heat map as World Cup kicks off.

A widespread heat wave is pushing dangerously high temperatures across large parts of the United States this week.

Extreme heat poses a risk to players, spectators and workers—find out where the danger is and how to keep cool ...

Portland could climb near 100 degrees this weekend, forecasters said. Little relief is expected until next week.

The national temperature outlook map for June 11-17 shows that above-normal temperatures are forecast for the entire lower 48 ...

In the Northeast, Thursday is expected to be the warmest day, forecasters at the New York office of the National Weather ...

The number on the thermometer only tells half the story. Here’s what to know about heat index—and why some scientists are ...

Local governments are using data to inform urban forestry initiatives and other work to mitigate the impacts of heat islands ...

2027 has notably high odds of becoming the warmest year on record, with the latest projections showing nearly an 80 percent ...

NPR's Eyder Peralta speaks with immunologist Nicole Baumgarth about why ticks are spreading to new regions, and what this increase in ticks could mean for the spread of Lyme disease.

Millions of people from Washington, D.C., to Philadelphia face afternoon highs in the upper 90s by Friday, June 12, 2026, as ...