How hot will it get as the humidity builds and a heat dome spreads toward the Northeast? What is a heat dome? Here's what to know and what it means.

The National Weather Service has issued a heat advisory for Kent and Sussex counties and an extreme heat watch for New Castle County, as the heat dome is expected to impact Delaware on July 25.

A heat advisory and extreme heat warning will be in effect as hot and humid conditions hit Delaware today. See the weekend weather forecast.

More than 100 million Americans are under heat alerts as the extreme temperatures that have smothered the Midwest this week arrive on the East Coast.

From Texas to New England, millions of Americans are facing dangerously hot temperatures that have led the National Weather Service to issue heat advisories and extreme heat warnings this week.

All of Florida will be under heat advisories Monday, July 21, as a heat dome spreads from the Ohio and Mississippi valleys. Here's what to know.

Extreme heat streaks are becoming more common in major U.S. cities as climate change fuels more dangerous heat.

Corn sweat and a heat dome will bring dangerous heat and humidity to the central United States this week.

Heat index advisories have been issued for the entire state of Florida with heat index values of 110-115 expected for July 21 as a heat dome spreads across the South, forecasters said.

Another Milwaukee summer day, another triple-digit heat index. Temperatures in Milwaukee could reach as high as 94 degrees July 23 with a heat index of 105 degrees, and the heat is likely to stick ...

Heat dome continues to raise temps across South and Midwest, will begin to move into Northeast ‘Corn sweat’ has increased temperatures throughout the Plains and Midwest this week.