COLLEGE PARK, Md. – A dangerous and expanding heat wave is expected to grip much of the Southwest and southern United States through this week and into the weekend, with some areas forecast to reach 115 to 120 degrees and experience life-threatening heat conditions.
According to the National Weather Service Weather Prediction Center, extreme heat will remain focused across portions of the Southern Plains, Lower Mississippi Valley, Gulf Coast, and parts of Texas through midweek before intensifying across the Desert Southwest later this week. Forecasters say the hottest conditions are expected to peak over the weekend and may continue into early next week.
In the southern U.S., afternoon temperatures are forecast to climb into the mid-to-upper 90s, with many locations in Texas and Oklahoma reaching the low 100s. Heat index values between 105 and 115 degrees are expected in many communities, increasing the risk of heat-related illnesses.
Across Arizona, Nevada, southeastern California, and neighboring states, forecast highs of 115 to 120 degrees are possible. NOAA said some locations could experience temperatures ranking among the 10 highest ever recorded for this time of year, while unusually warm overnight lows will provide little relief.
The Weather Prediction Center warns that widespread Major to Extreme HeatRisk is expected, meaning dangerous conditions could affect anyone without reliable cooling or adequate hydration. Officials recommend limiting outdoor activities during the hottest part of the day, drinking plenty of water, checking on older adults and other vulnerable individuals, and ensuring pets have access to shade and fresh water.
Forecasters also urge residents never to leave children, adults, or pets unattended in vehicles, even for a short time, as interior temperatures can rise rapidly to deadly levels.
The latest forecast updates and local heat advisories are available at weather.gov.
