I Saw this guideline for high school athletes based on WBGT (wet build globe temperatures).
Saw this, too, but not sure if it’s correct, the
NCHSAA cut-off point is 90 degrees with a heat index of 125. There are other safety measures at lesser temperatures and heat indices such as removing pads and water breaks.
Something else I’d noticed. The WBGT is a little different in other regions of the country because 0f acclimation. Suppose that means what someone gets used to. Here are their recommendations for teams in different places.
Side note: Sorry about this being a little tedious.
Side note: They also recommend that amaidendevil never be allowed to be an athletic trainer of handle any heat measuring equipment.
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Heat Safety Categories & Geographic Breakdown
- Category 1 (Mild / Cooler Climates)
- Threshold: Lowest risk baseline (WBGT ≤ 86.2°F / 30°C).
- Geographic Areas: Includes most of New England, states bordering Canada, the Pacific Coast, and the Rocky Mountain states. [1, 2, 3]
- Category 2 (Moderate Climates)
- Thresholds: Moderate risk adjustments (WBGT limits up to 89.9°F).
- Geographic Areas: A mid-section transitional band stretching from the interior Northwest through parts of Nevada, the Midwest, the Ohio Valley, and the mid-Atlantic/Northeast. [1, 2]
- Category 3 (Hot / High-Risk Climates)
- Thresholds: Strict risk caps (Outdoor workouts halted if WBGT reaches ≥ 92.0°F).
- Geographic Areas: The entire Southern U.S., states generally south of Pennsylvania, Ohio, Iowa, and Kansas, plus New Mexico, Arizona, and California’s Central Valley. (Note: States with massive climate variation like California cross multiple zones, spanning Categories 1 through 3). [1, 2, 3]
“Heat safety thresholds vary by region because athletes' physiological acclimatization differs by climate. Research shows that northern athletes adapt to cooler local norms, making them more vulnerable to exertional heat illness at lower Wet Bulb Globe Temperatures (WBGT) than southern athletes who are conditioned to chronically hot environments.”
Thought this was a little odd