* WHAT...Temperatures 105 to 107 expected. * WHERE...Much of south-central New Mexico, including the Mesilla and Hatch Valleys, and the western Tularosa Basin. This includes the city of Las Cruces. Also, in Texas...most of El Paso County, the Lower Valley through Hudsepth County, and the Salt Basin including Dell City. * WHEN...From 11 AM this morning to 9 PM MDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses.