Temperatures will be heating up this week in the Tri-Cities, hitting highs about 10 degrees above normal for July by the end of the week.
Highs should build from the low 90s Monday to about 100 degrees Friday and Saturday, according to the National Weather Service.
It has issued a fire weather watch from Tuesday morning through late that night because of possible thunderstorms.
It predicts a slight chance of thunderstorms Tuesday increasing to a 30 percent chance before 11 p.m. that night in the Tri-Cities.
The thunderstorms are expected to move from central Oregon and then possibly into the Columbia Basin.
Because of dry vegetation, there is a potential for numerous new fire starts and possibly significant wildfires through the region, according to the weather service.
However, the weather service has not raised the weather watch to the next level, a red flag fire warning.