Parts of California, Oregon and Washington state will experience extreme heat at least through Tuesday, forecasters say.

Red flag warnings now cover parts of Oregon, Washington and California. In Oregon and California, crews are battling flames that are burning thousands of acres. Along the West Coast, heat alerts remain in effect for 11 million people.

Dangerously hot conditions hit states up and down the West Coast over the weekend, owing to a persistent heat wave stretching from the Pacific Northwest to California and the desert Southwest.

Two major wildfires in California and Oregon force mass evacuations as firefighters battle blazes amid dangerous heat conditions.

Wildfires in California wine country and central Oregon are expanding, prompting hundreds of evacuations. Wildfires in California wine country and Central Oregon grew overnight, prompting hundreds of evacuations as firefighters worked Sunday to try to contain the blazes amid dry, hot weather.