 This is KNPR News. I'm Dave Becker. An excessive heat warning is in place through tomorrow evening for much of our region, and that could be extended. The National Weather Service says temperatures in the Las Vegas Valley, western Mojave Desert and Pahrump will range from 110 to 115 degrees, while Death Valley National Park can expect readings over 120. Overnight temperatures will not provide much relief. Lows in Death Valley and the Las Vegas Valley may not fall below 90.