Arizona's saguaro cactus has evolved to thrive in the extreme climate of the Sonoran Desert, but after decades of rising heat, even these towering icons are showing signs of stress.

Starting in 2020, parts of Arizona have seen extended periods of record-breaking heat. Temperatures often top 110 degrees, lasting for weeks on end and causing the hardy saguaro to drop dead from ...

Arizona's saguaro cactus has evolved to thrive in the extreme climate of the Sonoran Desert, but after decades of rising heat, even these towering icons are showing signs of stress.