 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 cooling centers that they've opened up.