Clark County and Southwest Washington will be under an extreme heat watch starting Sunday afternoon, according to the National Weather Service in Portland.
The heat watch runs through Monday evening. Dangerously hot conditions and temperatures ranging from 95 to 105 degrees are forecast.
Temperatures will be in the 60s overnight.
The heat watch also applies to Portland, the state Highway 14 corridor in the Columbia River Gorge, Cowlitz County and much of the Willamette Valley in Oregon.
The Portland-Vancouver area hasn’t experienced temperatures higher than 100 degrees so far this summer, according to Treena Jensen, a National Weather Service meteorologist in Portland.
“We do tend to have a few extreme heat events each summer,” Jensen said. However, these high temperatures are unusual