Dangerous Heatwave Across the Western U.S; Hot and Humid in the Southeast and Mid-Atlantic

A heatwave is poised to bring record-breaking temperatures across the Western United States through the weekend. Triple digit high temperatures are expected as Excessive Heat Warnings are in effect. Hot and humid conditions will spread into the Southeast and Mid-Atlantic through the weekend and into next week. Heat index values up to 110 degrees will be possible. Read More >

Click a location below for detailed forecast.

Last Map Update: Fri, Jul 5, 2024 at 8:00:16 pm PDT

Watches, Warnings & Advisories

National Weather Service Seattle/Tacoma, WA

Zoom Out

Excessive Heat Warning

Red Flag Warning

Heat Advisory

Small Craft Advisory

Fire Weather Watch

Excessive Heat

Heatwave on the Way

Heat becomes especially dangerous if it lingers for more than one day. Hot days and warm nights don't give our bodies time to cool down. Heat islands can intensify extreme hot weather, which can cause breathing problems, heat cramps, heat stroke, and may lead to illness or even death. What can YOU do? Check on your friends, family and neighbors during heat waves. Wear light, loose-fitting clothing and drink water often. Don't wait until you are thirsty. Avoid unnecessary hard work or activities if you are outside or in a building without air conditioning. Stay in an air-conditioned area. Air conditioning is the strongest protective factor against heat-related illness.