Major risk' from heat up to 115 degrees through Friday night for Tucson, Southern Az

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Major risk' from heat up to 115 degrees through Friday night for Tucson, Southern Az

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Fourth of July in Arizona: Live updates on travel, weather, fireworks

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Heat is biggest opponent as Arizona high football teams begin practice

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Tucson Breaks Another Daily Heat Record, at 115 - AZPM

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

First Alert weather days issued as extreme heat engulfs Arizona

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

First Alert weather days issued as extreme heat engulfs Arizona

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Dangerous 110-plus-degree heat in Arizona likely to persist for weeks

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Heat Wave in West Brings Record High Temperatures - WSJ

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Phoenix Breaks Heat Record Set in 1974 - The New York Times

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Extreme heat wave, perhaps worst ever, forecast for Southwest

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Historic heat wave engulfing southern U.S. isn't moving anytime

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Study says climate change may make 6 AZ counties uninhabitable

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Arizona weather: Live updates on record Phoenix heat wave

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

High temps in Phoenix could crack the 115-degree mark

Major risk' from heat up to 115 degrees through Friday night for Tucson,  Southern Az

Heat waves, like one that's killed 14 in US, becoming more common