Intense heat in the Desert Southwest is expected, with an average of 111 days at or above 100°F in Phoenix, specifically. In 2026, the Valley of the Sun has already had 100 days in the triple digits, with two more months left in the 'heat season,' and the oven keeps cranking.

The TemperatureRadar has been bright pink, indicating the intense heat in the Desert Southwest for weeks. Wednesday's forecast high of 115°F in Phoenix comes close to the 2011 record of 117°F, and more triple-digit heat is expected as a strong high pressure, the same one keeping the southern Plains locked in record-making heat, sticks around.

The extended forecast shows triple-digit days for Phoenix through the end of next week. Phoenix's heat season typically lasts through early October.