An extreme heat watch was issued by the National Weather Service on Wednesday at 2:50 a.m. valid from Friday 11 a.m. until Monday 5 a.m. for Lower Columbia River, Tualatin Valley, West Hills and Chehalem Mountains,

An extreme heat watch has also been issued from Wednesday afternoon through Saturday evening for much of the Southern California region. Weather officials say the hot conditions will increase the risk of heat illness for everyone, especially vulnerable populations, including young children, the elderly and those without air conditioning.

The Willamette Valley, southwest Washington, and Columbia River Gorge are all included in the watch. The hottest temperatures are forecast south of Salem and portions of the Columbia River Gorge.