Meteorologists say a phenomenon known as a heat dome, a large area of high pressure in the upper atmosphere that traps heat ...

The Painesville Electric Plant will generate power from June 23-25 to counter potential cost increases during the heat wave, the city announced in a news release. The city said power costs often ...

New York City’s mayoral primary on Tuesday will land in the middle of a life-threatening heat wave — leaving some candidates ...

Extreme humidity and heat will affect about 265 million people across the country this week. Maps show where and when to ...

A multiday heat wave is bringing high temperatures and health risks from the Midwest to the Northeast, prompting warnings and ...

As the official start of summer arrives, the United States is being hit by a dangerous heat wave, making this the first ...

More than 150 million Americans are under the highest-level extreme heat alerts during a wave of above-average temperatures.

Temperatures are expected to soar into the upper 90s between Sunday and Wednesday, and the heat indices could exceed 100, putting sensitive groups at risk.

A dangerous, record-breaking heat wave will spread over the eastern United States and is expected to last several days.

A significant and intense heat wave is set to engulf the central and eastern United States, delivering the highest ...

High temperatures across the Plains, Midwest, Mid-Atlantic and Northeast are expected to hit at least 15 degrees above normal ...

Much of the country is facing brutal, potentially deadly heat. The reasons for such extreme events are not complicated.