Pico Rivera street gets renamed after Mariachi Star Vicente Fernández. Photo courtesy of Matt Gush on Shutterstock

Triple-digit heat will keep the Inland Empire baking Wednesday, prompting the National Weather Service to issue a heat advisory for the region.

“Days will be slightly hotter and nights a little warmer, with the resulting heat risk sufficient for a heat advisory for Monday through Wednesday,” the NWS said in a statement. “

The summer scorcher began last week, with the mercury hitting or slightly exceeding 100 in the Riverside metropolitan area in an unbroken cycle over the previous six days.

The current advisory will run until 8 p.m. Wednesday.

“Drink plenty of fluids, stay in an air-conditioned room and stay out of the sun,” the NWS stated.

Forecasters said a ridge of high pressure over the Great Basin of Utah and Nevada is influencing weather patterns. Meanwhile, low pressure troughs over Arizona and Mexico are scooping up monsoonal moisture, stirring convective activity and generating thunderstorms, mostly east of the San Gorgonio Pass.

“There will continue to be a flow of monsoonal moisture into the area with mid-level southeast flow while higher level flow is drier and southwest,” the Weather Service said. “Isolated to scattered thunderstorms are expected to develop each afternoon in the mountains along convergence boundaries toward the mountain ridge tops, then migrate toward the deserts as the sea breeze moves inland.”

High temps in the Riverside metropolitan area are predicted to reach 104 Wednesday, with lows in the low 70s. In the Coachella Valley, 108 will be the average daytime high, with lows in the upper 80s, while in the Temecula Valley, the mercury will top out in the mid 90s, with lows around 70.

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