University Interscholastic League mandatory WBGT activity guidelines for outdoor Texas high-school athletic and marching band practices from the 2026-27 school year. Two regional classes: Class 2 (West Texas / Panhandle, lower cutoffs) and Class 3 (rest of Texas). An athletics overlay, not an occupational work/rest rule.
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No standalone formula is published for this standard; see programmable logic and parameters below.
| WBGT (°C) | Light 180 W | Moderate 300 W | Heavy 415 W | Very heavy 520 W |
|---|---|---|---|---|
| 24 | Green | Green | Green | Green |
| 25 | Green | Green | Green | Green |
| 26 | Green | Green | Green | Green |
| 27 | Yellow | Yellow | Yellow | Yellow |
| 28 | Yellow | Yellow | Yellow | Yellow |
| 29 | Yellow | Yellow | Yellow | Yellow |
| 30 | Orange | Orange | Orange | Orange |
| 31 | Red | Red | Red | Red |
| 32 | Red | Red | Red | Red |
| 33 | Stop work | Stop work | Stop work | Stop work |
| 34 | Stop work | Stop work | Stop work | Stop work |
| 35 | Stop work | Stop work | Stop work | Stop work |
| 36 | Stop work | Stop work | Stop work | Stop work |
This standard's declared inputs do not include acclimatization status, so results do not vary by it.
| Parameter | Value |
|---|---|
class3WbgtF |
|
class2WbgtF |
|
Required inputs: wbgtC
Optional inputs: texasUilClass
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Get notified when Texas UIL Heat Stress & Athletic Participation - WBGT Activity Guidelines changes — threshold changes, scope and legal-status changes, additions and removals. Changes that permit more heat exposure than before are labelled as such.
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