The National Weather Service predicts areas on the East Coast could reach 100 degrees Thursday, with triple-digit temperatures in the Pacific Northwest, too. Relief isn't expected until the weekend.
There's been about two degrees Fahrenheit of warming so far worldwide. That may sound like a small number, but scientists say it's enough to make extreme weather events much more common.
With much of the U.S. already sweltering this summer, even avid runners, hikers and bikers are wilting. We've got 10 strategies from experts on how to enjoy hot weather exercise without keeling over.
A new study finds that for more than 70% of all U.S. counties, urban temperatures are higher in neighborhoods that have low-income people and communities of color.
The town of Lytton, British Columbia, caught fire and was completely evacuated Wednesday, just one day after setting a new all-time Canadian heat record with a high of 121 degrees Fahrenheit.
Heat-related illnesses have sent hundreds of people to the ER across the region as temperatures hit unprecedented highs. British Columbia reported about 100 excess deaths from Friday to Monday.
From the Great Plains to the California coast, a powerful "heat dome" is setting records. This one is stronger and bigger and is appearing earlier than normal.
When a weather station in Death Valley recorded a high of 130 degrees Sunday, it triggered an inquiry to verify the reading. Here's a look into the exacting process of vetting extreme weather claims.