Latest Wet Bulb Globe Temperature Observations

Tropical Storm Edouard to Impact the Northwest Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard will bring tropical storm to hurricane conditions, heavy rainfall, flash and some river flooding, and storm surge to portions of Upper Texas and southwestern Louisiana coasts into Wednesday. Severe thunderstorms are possible in the Central Plains and Mid-Atlantic. Hot and humid conditions will expand from the Central Plains into the Ohio Valley and Mid-Atlantic. Read More >

Texas UIL WBGT & Heat Index Calculator

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Heat Index

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Regional Guidelines: Texas UIL Class 3

UIL WBGT Activity Chart

Flag Level	Class 2 (West TX)	Class 3 (Central/East/South TX)
🟢 Low	< 79.7 °F	< 82.0 °F
🟡 Elevated	79.7 - 84.6 °F	82.0 - 86.9 °F
🟠 Moderate	84.7 - 87.6 °F	87.0 - 90.0 °F
🔴 High	87.7 - 89.7 °F	90.1 - 92.0 °F
⬛ Extreme	≥ 89.8 °F	≥ 92.1 °F

UIL Regional Classification Notes:

Category 2 (West TX / Panhandle): Higher elevation and lower ambient humidity allow for greater evaporative cooling; thresholds trigger earlier.
Category 3 (Central, East, Coastal & South TX including Laredo): Sustained high ambient heat and humidity require modified activity thresholds.

🟡 Category 2 (West TX) | 🔵 Category 3 (Central, East & South TX)

UIL Activity & Practice Modifications:

Low (Green): Normal activities. Provide at least three separate rest breaks each hour (min 3 min each).
Elevated (Yellow): Use discretion for intense/prolonged exercise. Min 3 rest breaks per hour (4+ min each). Rapid cooling zone required.
Moderate (Orange): Max 2 hours outdoor practice. Min 4 rest breaks per hour (4+ min each). Football: Shorts, helmets & shoulder pads only. No conditioning.
High (Red): Max 1 hour practice. No protective equipment or conditioning. 20+ mins of rest breaks distributed throughout the hour.
Extreme (Black): No outdoor workouts or contests. Delay or move activities indoors.

Guidelines based on official University Interscholastic League (UIL) Health & Safety Heat Stress Policies.