 In suburban Houston, meanwhile, one person died when a tree fell on a home. Headed into the midday, Beryl had knocked out power to two million homes and businesses. Jim Ryan, ABC News, Dallas. The West is still in the grip of a dangerous and deadly heat wave. Las Vegas hit 120 degrees, the city's hottest day on record. Phoenix set a new daily record for the warmest low temperature. It never got below 92 degrees yesterday. And a motorcyclist died from heat exposure while visiting Death Valley National Park.