Phoenix Hits Record 118° in August Heat Wave Inferno

PHOENIX — Arizona's desert furnace reached unprecedented August levels Thursday as Phoenix clocked 118 degrees, eclipsing a four-way tie at 117 degrees set in recent years, including 2024. Records dating to 1895 confirm this as the city's hottest August day ever, according to National Weather Service data. The day prior, Wednesday's high hit 116 degrees, while daily highs this month have lingered between 112 and 114 degrees.

The heat wave, stretching from California to Wyoming, has blanketed central and southern Arizona under Extreme Heat Warnings through Friday evening. An influx of atmospheric moisture has spiked humidity, intensifying the misery for residents in Phoenix, Tucson and Yuma. Officials urge limiting outdoor activity between 10 a.m. and 6 p.m., with cooling centers open across Maricopa County.

Friday's highs should dip slightly but stay oppressive near 115 degrees in Phoenix, with monsoonal moisture fueling potential thunderstorms. Temperatures ease to more seasonal 110-degree highs over the weekend and into next week, offering scant respite in a summer already etched with extremes. Statewide, the event underscores Arizona's vulnerability to prolonged heat domes amid climate patterns.