* WHAT...Temperatures up to 107 expected. * WHERE...In New Mexico, Eddy County Plains. In Texas, Eastern Culberson, Loving, and Ward Counties, and Reeves County Plains. * WHEN...From noon MDT /1 PM CDT/ Monday to 8 PM MDT /9 PM CDT/ Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses. Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.