Temperatures in the Tri-Cities will again top the century mark this week and may even hit record highs.
Residents throughout the Lower Columbia Basin -- from Prosser to Connell -- should see mostly sunny skies through Thursday, with possible showers and thunderstorms moving into southeastern Washington on Friday.
The daytime highs will get progressively warm with not much of a cooldown at night, said Ann Adams of the National Weather Service in Pendleton.
"There's been a little break, and then now we're back into summertime temperatures," Adams told the Herald.
Sunday's high was in the mid-90s. One weather station in Kennewick reported 93 while the Tri-Cities Airport in Pasco recorded 96.
Monday should register between 99 and 104 degrees. Tuesday is likely to be the warmest day between 100 and 105, before dropping one degree Wednesday and Thursday, she said.
"The overnight lows will be a little bit on the warm side," only dropping to a range of 66 to 72 this week, Adams said.
The normal temperature for Kennewick and Pasco in the final days of July is in the lower 90s, she said.
The highest temperature on record for the entire month of July was set in 1939 in Kennewick at 115.
Though the thermometer isn't forecast to jump that high, a record could be tied or broken on Tuesday in Pasco -- 105 set in 2003 -- or Wednesday in Kennewick -- 105 in 1982.