30 Million People Under Heat Alerts As Western US Swelters

Sweltering conditions have hit much of the Pacific seaboard and as far inland as the western edge of the Rocky Mountains over the weekend, with forecasters warning of more to come on Sunday.

Hot weather alerts are in place for more than 30 million people across the western United States after the region's second heat wave in weeks brought another round of record-equalling high temperatures. Sweltering conditions have hit much of the Pacific seaboard and as far inland as the western edge of the Rocky Mountains over the weekend, with forecasters warning of more to come on Sunday. Las Vegas matched its all-time record of 117 degrees Fahrenheit (47.2 Celsius), according to the National Weather Service (NWS) -- a temperature recorded in the desert entertainment city once in 1942 and three other times since 2005. Forecasters issued an excessive heat warning for the city along with several other urban centers including the southern city of Phoenix and San Jose, the center of the Silicon Valley tech industry south of San Francisco.