this is nbc nightly news with lester holt. good evening like breathing fire 50 million people in the west from california to montana suffering under heat alerts and temperatures not just a little bit hotter than normal but pushing 15 to 30 degrees above average. a relentless heat wave now more than a week in smashing records. at 116 degrees yesterday sacramento recording its highest temperature ever in fact, over a million northern californians have experienced temperatures of 110 or higher a danger to people, the crippling heat also leaving the region s power providers and customers on tenterhooks. officials imploring californians tonight to conserve electricity use during peak demand hours, hoping to avoid rolling blackouts. miguel almaguer is there and has the very latest reporter: tonight across california, the lights are on for now. on the brink of blackouts again as power demand reached an all-time record high overnight, slivers of the golden state plunged into dark
emergency alerts urging residents to conserve power how much longer will it last? also tonight, the explosive new report in the nuclear secrets found at mar-a-lago and the moment that the white house today barack and michelle obama back for their unveiling of the official portraits the former first lady appearing to take a jab at mr. trump what she said. vladimir putin defiant saying russia has lost nothing as ukraine s counter offensive intensifies. just in, the second suspect wanted t in deadly stab ibintngene. rampage in canad a under arrest s ending new york ending its mask mandate for subways, buses, and other mass transit after more than two years. it comes as covid cases among kids rise across the nation and new boosters roll out. dr. jha answering your questions. our nightly news exclusive, the dark secret behind some of the marijuana that ends up in legal dispensaries we go inside the raid.