 We are looking at a heat warning that has been extended up until Thursday at 11 p.m. Basically, we're seeing heat alerts in effect for not only just all of southern Nevada, but all across our entire state and, of course, parts of the West Coast moving into parts of the Pacific Northwest. Well, travelers are crowding on the planes heading home from the July 4th holiday. The TSA expects them to set a new record today, screening more than 3 million people. CBS's Elise Preston is at LAX.