The National Weather Service issued a Heat Advisory through Monday night.
The Advisory extends from Kelso to Cottage Grove and the Coast Range to the Cascades.
Temperatures could reach 100.
Sunday will be the hottest day with only slight cooling on Monday. Tuesday’s high is expected to still be warm at 90 degrees.
Temperatures drop into the 80’s on Wednesday.
A Red Flag Warning is in effect for the Washington Cascades due to low humidity and winds that will make fire danger high.