WBGT Warning Looms Over Roland Garros as Heat Rises

TL;DR Summary
The French Open is confronting dangerous heat, with officials using the wet bulb globe temperature (WBGT)—a metric that combines temperature, humidity, solar radiation, and wind—to gauge risk and justify shade breaks, cooling, and potential delays. While elite athletes can tolerate higher heat, WBGT thresholds around the mid-80s°F mark signal growing health risks, and scientists warn that climate trends could push these extreme conditions into the norm in hot regions.
- Why It's Almost Too Hot to Play Tennis at the French Open 2026 WIRED
- Baking on the clay: How players are feeling the heat in a French Open furnace The Guardian
- French Open 2026: How Paris heatwave is forcing players to adjust to conditions BBC
- French Open groundskeepers drench the clay courts with water and salt during heat wave AP News
- French Open: What level of heat would stop play? France 24
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