This may have already been mentioned, but anyone planning to drive from Vegas to Lone Pine, there was a devestating Flood at Death Valley National Park on August 14 and 15. Two died and the Park was closed. Some roads are re-opening but many are still closed. You can find more information on the National Park Web site.
Very ironic. We traveled through Death Valley to Lone Pine a week before the flood and stayed at the Frunace Creek Ranch. We were worried about the climbing Mt Whitney (we summited on August 12) but it never occurred to us to be worried about flash floods in Death Valley.