tonight, the state of emergency as a triple-digit heat wave fuels dangerous wildfires in the west. at least 25 major fires burning across california. more than 2 million acres burned in record time. the daring nighttime rescue. black hawk and chinook helicopters used to lift stranded campers out of the fire zone. some forced into the water to avoid the flames. and the one fire in southern california that authorities say was ignited by a smoke bomb during a gender reveal photo op. also developing tonight, the vaccine and voters. with less than two months until election day, president trump attacking his democratic rivals, calling them anti-vaccine during an impromptu white house news conference. the president again denying that report he disparaged america's war dead, allegedly calling them losers.