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1. Study Reveals App Inaccuracy - A UGA study found a heat safety app often underestimates temperatures compared to accurate onsite WBGT (wet bulb globe temperature) readings.
1. Missed Activity Warnings - The app didn’t always suggest needed changes like shorter practices or water breaks - posing risks to athletes, students, and outdoor workers.
1. Heat: A Leading Killer - “Heat is the top weather-related killer in the U.S.,” says Prof. Grundstein. Accurate monitoring is crucial to prevent heat-related deaths.
1. How WBGT Works - WBGT combines air temp, humidity, wind, and sunlight. It’s a trusted tool for sports and schools - but apps now try to estimate it digitally.
1. Research Across 11 States - Researchers gathered WBGT data from 26 U.S. high schools on turf and grass over two months - comparing app readings with real measurements.
1. Up to 4°F Cooler Readings - In high heat (WBGT >90°F), the app often showed temps up to 4°F lower, failing to trigger alerts that could protect people from overheating.
1. Onsite Tools Still Best - Smartphone apps are handy but not always accurate. Experts say onsite WBGT sensors remain the best way to manage heat risks effectively.