A heat advisory will go into effect Monday in many areas of Riverside County, where temperatures will soar well above 100 degrees on Labor Day.

The advisory will be in effect from 10 a.m. Monday to at least 6 p.m. Tuesday in areas including downtown Riverside, Temecula and Hemet, according to the National Weather Service.

“The ridge is going to begin to expand further westward and allow for highs to be even warmer tomorrow, with highs likely topping out above the 100 degree mark for most locations within the Inland Empire. For this reason, a Heat Advisory is in place tomorrow for all of the inland areas, including Orange and San Diego counties,” the NWS said Sunday.

The Riverside metropolitan area was predicted to reach 100 degrees on Sunday and 102 on Labor Day, according to the NWS.

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