Maricopa County's chief medical officer said the county saw 427 heat deaths in 2025, down from 608 the year before.

Unusually high temperatures in parts of the Southwest is closing hiking trails as temperatures hit 100 degrees early this ...

'This is effectively a full-on summer heat wave in March,' a climate scientist wrote on X.

This week, Las Vegas and the surrounding areas are expected to hit record-breaking temperatures in the 90s and possibly 100s.

Add Yahoo as a preferred source to see more of our stories on Google. Phoenix recorded 427 heat-related deaths last summer, a roughly 30% decline from 2024, but city leaders say the progress is not a ...

The number of people seeking emergency care for heat-related issues grew faster than for non-heat-related health issues in mountain states and Texas.

As heat waves intensify, new evidence from Ontario shows that resident-room air conditioning can mean the difference between life and death for nursing home residents. Study: Air Conditioning in ...