 The Dow dropped 31 points today to 39,344. The Nasdaq was up 50 points. You're listening to NPR. This is KNPR News. I'm Dave Becker. For the first time in its history, Las Vegas' official high temperature reached 120 degrees yesterday. Dozens of locations across the West, Death Valley, Redding, California, Salem, Oregon even, and Lake Tahoe reached or tied new heat records.