The source of the heat is a sprawling heat dome — or strong zone of high pressure — that is centered over northern Mexico and the southwest United States, where record high temperatures are ...

Houston’s official climate observation site at Bush Intercontinental Airport set another daily temperature record Tuesday. Is ...

A massive heat dome across the American Southwest is driving temperatures in Phoenix and Las Vegas to record triple-digit highs. New Maxar satellite photos show how the growth of these cities is ...

according to a National Weather Service heat risk map. This heat wave has sparked questions about if a heat dome is causing significant temperatures even before the first official day of summer ...