An Extreme Heat Warning is currently in effect for the Tucson Metro Area and surrounding regions, including South Central and Southeast Pinal County, the Tohono O'odham Nation, and Western Pima County, lasting until 8 PM MST on Sunday. Expected temperatures range from 100°F to 108°F (38°C to 42°C), posing significant risks of heat-related illnesses. Residents and visitors are strongly encouraged to take precautions, particularly during the hottest parts of the day, to mitigate the effects of the extreme heat, with special emphasis for those not acclimated to such high temperatures.