Houston faces a triple threat of scorching heat, dangerous heat index values, and afternoon thunderstorms as the week closes, with the worst impacts expected Thursday and continuing through the weekend. Residents could see heat index values soar as high as 109°F Thursday, while isolated downpours and lightning may disrupt travel, outdoor plans, and late-summer routines.
According to the National Weather Service, Thursday brings a 30 percent chance of thunderstorms—mainly in the afternoon—paired with highs near 98°F and heat index values over 105°F. Friday keeps the trend going, with another 30 percent chance of storms and high humidity pushing “feels like” temps up to 102°F by midday. Southeast winds stay light, but any thunderstorm could produce brief heavy rain and localized flooding.
Saturday and Sunday continue the unsettled pattern: Storm chances climb to 40 percent Saturday and reach 50 percent by Sunday, with highs staying in the low to mid 90s. Overnights remain muggy, rarely dropping below 78°F. While the strongest storms may stay scattered, expect rapid weather changes and keep an eye on local alerts—especially if you’re traveling I-45 or planning time outdoors.
Residents should limit time outside during peak afternoon heat, stay hydrated, and avoid driving through flooded roads. School schedules and outdoor activities could be disrupted if storms intensify. More showers and thunderstorms are possible into early next week, with weather watches likely if trends continue.
Five Day Forecast for Houston, TX
- Thursday: High near 98°F, 30% chance of PM storms, heat index up to 109°F.
- Friday: High 93°F, 30% chance of storms after 10 a.m., humid and hot.
- Saturday: High 92°F, 40% chance of PM storms, muggy overnight.
- Sunday: High 92°F, 50% chance of storms, partly sunny.
- Monday: High 92°F, 40% chance of storms, mostly sunny.
