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L.A. heat wave: Spike in temperatures expected through midweek

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After weeks of cooler temperatures, and even spurts of rain, Los Angeles will experience a warm-up this week with temperatures as high as 15 degrees above normal, forecasters said.

A “very large” high-pressure system will bring temperatures into the upper 80s along with off-shore winds from the northeast, National Weather Service weather specialist Stuart Seto said. Downtown, for example, will warm to about 87 degrees on Monday before a cooling trend begins after Wednesday.

Temperatures are “really on the climb,” Seto said. “We’re going to be on the warmer side for the next four or five days.”

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By Tuesday, ocean breezes from the coastal areas will cool the beaches and areas as far east as downtown, Seto said. However, the valleys will remain around 86 degrees through Wednesday before cooling off.

By Friday, the Southland will be back in the 70s.

“We haven’t had anything like this for a while,” Seto said. “Have your water with you.”

matt.stevens@latimes.com

Twitter: @MattStevensLAT

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