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Brace Yourselves For A Heat Wave, Los Angeles

Heat wave (Photo by Gamma Infinity via the LAist Featured Photos pool)
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Wave good-bye to June gloom, and say hello to a really big heat wave.

Things will start heating up Friday morning and it's only supposed to get worse through the weekend. As usual, the heat will be worst in the valleys and mountains. The National Weather Service has put out an excessive heat warning.

Temperatures could reach 114 in Antelope Valley, 108 in the mountains and 106 in the Santa Clarita, San Gabriel and San Fernando valleys, the National Weather Service says. It warns that this heat wave will not be a dry heat—the humidity will make it seem even worse than it is. At night, there won't be much of a respite: temperatures will dip down into the high 70s or low 80s.

A shallow marine layer will protect the coast from the worst heat through Friday, but that layer could evaporate over the weekend.

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The National Weather Service isn't promising that things will cool off any time soon and warns that it may have to put out another warning next week.

Authorities are warning that the risk of wildfires goes up with the temperature, and they're warning people to be mindful of the heat—especially the young, sick and elderly. Los Angeles County is opening up cooling centers (which you can find on this interactive map or this PDF).

"Heat exhaustion, cramps or in extreme cases heat stroke can result from prolonged exposure to these conditions," the National Weather Service warned. Call 9-1-1 if you suspect someone is suffering from heat stroke. Here are some tips on dealing with the heat or recognizing the symptoms of heat illnesses.

And for the love of God, don't leave your dog or child in the car—even for "5 minutes."