Rebecka Garcia, 9, with coaching from her mother, Irma Monterroso, works on her backstroke at Reseda

RESEDA, CA - JULY 07, 2017 - Rebecka Garcia, 9, with coaching from her Mother Irma Monterroso works on her backstroke as they cool off in the Reseda Park Pool in the San Fernando Valley Friday afternoon July 07, 2017 as the region's latest heat wave is going into its second day. The National Weather Service says it will generate dangerous and potentially life-threatening heat across much of Southern California today and tomorrow. (Al Seib / Los Angeles Times)
Al Seib / Los Angeles Times
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