The most intense heat of the summer arrives this week when parts of Los Angeles will be under extreme heat warnings and other areas will face severe fire conditions.

What authorities described as a severe heat event with days of temperatures in the upper 90s and well into the 100s will begin Wednesday and continue through the weekend.

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"This is dangerous heat headed for Southern California," said NBCLA meteorologist Belen De Leon . "High pressure, which is warm, stable air, is starting to sneak into our area. It's not going to budge anywhere.

"We won't see much relief until next week."

Heat illness risks usually reserved for desert areas will be more widespread, De Leon said.

An extreme heat warning will be

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