Heat Wave and Tropical Storm Bertha Amplify Extreme Temperatures Across Texas and Louisiana

A sweltering heat wave is sweeping southeast Texas, Louisiana and western Texas as Tropical Storm Bertha moves westward along the Gulf Coast. The National Weather Service (NWS) projects heat-index values up to 116 °F (47 °C) in southeast Texas and 115 °F in parts of Louisiana, with humidity from the storm making conditions feel even hotter. In North Texas, forecasts call for highs in the upper-90s to 105 °F and heat-index readings of 110-115 °F. West Texas cities such as Lubbard expect daytime highs of 102-104 °F, roughly 10-12 °F above normal.

Bloomberg

The extreme heat is driving record electricity demand. Preliminary ERCOT data show projected demand approaching 90 GW on Wednesday afternoon, surpassing the previous high of 85.508 GW set in August 2023. A separate Bloomberg report forecasts a demand peak of 88 GW on Tuesday, also exceeding the 2023 record. ERCOT notes that roughly 120 GW of generation capacity remains available, and solar output is expected to rise, providing a cushion against immediate shortages.

Bloomberg

NWS meteorologists emphasize the danger of the combined heat and humidity. Megan Williams, also with the NWS, warned that “people always underestimate the heat” and that it can “sneak up on you.” In West Texas, Joe Jurecka of the Lubbock NWS office cautioned that higher humidity will “drain people a bit faster” and advised residents to stay hydrated and limit outdoor activity.

Lubbock Avalanche Journal

• “It's going to be hot, and it's a little bit more humid than typical out here as well. So people may want to be a little bit more cognizant that it's going to feel worse than it normally is out here,” — Monday. Joe Jurecka

Lubbock Avalanche Journal

• “It all depends on what you want to define as a heat wave. There's no formal definition for that,” — Monday. Joe Jurecka

Lubbock Avalanche Journal

• “Wednesday’s high is 102, 104 on Thursday and 104 on Friday. That's 10 to 12 degrees above normal. But as far as it being unusual? No.” — Monday. Joe Jurecka

Lubbock Avalanche Journal

• “The humidity is going to be higher than what I would say average is for West Texans during the summer, by a little bit, and so that's going to drain people a bit faster probably,” — Monday. Joe Jurecka

Lubbock Avalanche Journal

Two Bloomberg pieces give different peak-demand forecasts—one cites a near-90 GW record, the other a 88 GW peak—highlighting uncertainty in short-term demand modeling. No definitive data on actual generation output or real-time grid stress has been released, leaving the extent of any imminent supply shortfall unclear.

Bloomberg