 in the warm waters of the Gulf and hit south Texas by late Sunday or early Monday. A slow-moving and potentially record-setting heat wave spreading across the western U.S., sending many residents there in search of a cool haven from the dangerously high temperatures. The National Weather Service says the southeast and mid-Atlantic regions of the U.S. are also sweltering, with the oppressive heat and humidity expected to last all the way through Saturday. In Portland, Oregon, people are seeking out rest.