Heat Advisory Starts Thursday Noon in Houston Area as Heat Index Nears 108

A Heat Advisory takes effect at noon Thursday and is scheduled to run through 7 p.m. Friday, triggered when the heat index reaches 108° or higher across more than isolated spots [1]. Houston's air temperature is forecast to reach 100°, with triple-digit readings possibly lasting into Tuesday of next week, and the advisory reportedly may be extended if the heat persists [1]. Forecasters attribute the pattern to a strong ridge of high pressure that compresses and warms sinking air [1].

Sources

1. click2houston.com · Heat Advisory goes into effect on Thursday because of high temperatures and humidity Aug 20, 2026
2. click2houston.com · Houston heat wave: Temperatures make a run at 100 for multiple days this week Aug 18, 2026

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