Cesar Rodriguez for The New York Times Many schools in northwestern Mexico ended classes early and others moved online to protect children from the intense heat. Cattle ranchers reported hundreds ...

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 ...

The heat wave will maintain a hot to very hot afternoon ... Hidalgo (north), Queretaro (north), Guanajuato, State of Mexico (southwest), Puebla (north and southwest), Chiapas, Tabasco and Quintana ...

The spring months (March-May) are typically the hottest in Mexico City, with temperatures cooling off once the rainy season ...

according to a map by the National Weather Service (NWS) HeatRisk. Extreme heat is expected over the next 24 hours in Texas, ...