Phoenix has been grappling with unprecedented heat, setting new records for the hottest September temperatures ever recorded. On September 29, the city broke the daily high temperature record by a significant margin, reaching 108 degrees by 11:21 AM, surpassing the previous record of 107 degrees set in 2003.
Historic Heat Wave
This heat wave has been particularly severe, with Phoenix experiencing its hottest summer on record and now extending that trend into fall. The city has never seen temperatures above 110 degrees so late in September before, with the previous latest date being September 19 in 2010. This year, temperatures surpassed 110 degrees on September 25, setting a new record by six days.
The excessive heat warning, which has been extended through Thursday, advises residents to avoid sun exposure from 10 AM to 6 PM and to stay hydrated. The warning affects areas of southwest and southcentral Arizona, which are expected to endure highs between 109 and 113 degrees throughout the week.
Record-Breaking Days
Phoenix has now recorded 66 days above 110 degrees this year, exceeding the previous record of 55 days set in 2023. The city also saw a record-breaking high of 117 degrees on a single day in September, doubling as the hottest September day in history.
The low temperature at Phoenix Sky Harbor International Airport on Sunday was 88 degrees, 15 degrees above normal and six degrees above the previous daily warm low of 82 in 1992. These extreme temperatures highlight the intense heat wave that continues to affect the region.
Public Health Concerns
The prolonged heat wave has significant public health implications, with residents advised to take stringent precautions to avoid heat-related illnesses. Staying hydrated, avoiding outdoor activities during the hottest parts of the day, and seeking cooler environments are crucial measures to mitigate the risks associated with this extreme weather.
