 The convention starts tomorrow. The extreme heat continues with more than 117 million people under some sort of heat alert nationwide. Meteorologist Frank Barreras with the National Weather Service. There are heat advisories, watches and warnings across portions of the western U.S., including California, Pacific Northwest, as well as a good portion of the Central Plains. About a half a million customers don't have power still in Houston more than a week after Beryl. The high there today is 93.