暑あつさ指し数すう

noun

wet bulb globe temperature index; WBGT index; heat stress index

A technical index used to assess heat stress risk, combining temperature, humidity, and solar radiation. Commonly referenced in weather reports and occupational safety guidelines.

• 暑あつさ指し数すうが高たかい日ひは、屋おく外がいでの運うん動どうを控ひかえたほうがいい。

  On days when the WBGT index is high, it's better to avoid outdoor exercise.