美国大部分地区正笼罩在严重热浪中，约9700万人面临高温预警 [1]。从中部平原到东南部的多个州，气温预计达到100华氏度或更高，结合高湿度可能使体感温度飙升至115华氏度 [1]。夜间最低气温保持在70多华氏度，而城市地区的夜间气温甚至不会低于80华氏度 [1]。气象学家杰夫·马斯特斯警告称："长时间持续、强度大、湿度高的综合因素会导致这次热浪致命" [1]。
这波极端高温恰逢新学年开始，引发学校和运动队采取多项预防措施。根据记录，从1992年至2024年间，全美至少58名运动员死于劳动型热中风 [1]。南卡罗来纳州因高温预警取消了十多所高中的橄榄球热身赛 [1]。一个中阿肯色州学区实施了新政策，当热指数达到95华氏度时，学生必须留在室内 [1]。7月成为美国连续地区有记录以来最热的月份 [1]。
Approximately 97 million Americans face heat alerts as an oppressive heat wave grips much of the United States, with conditions intensifying as students return to school.[1] From the central plains to the southeastern states, temperatures are forecast to exceed 100 degrees Fahrenheit, and when combined with high humidity levels, the heat index could reach as high as 115 degrees Fahrenheit.[1] Overnight lows are expected to remain in the 70s across most areas, though urban regions may not dip below 80 degrees.[1]
The severity of this weather event has prompted widespread preventive measures across educational and athletic institutions. South Carolina has cancelled football preseason games at more than a dozen high schools due to the extreme heat alerts,[1] while a central Arkansas school district has implemented a policy requiring students to remain indoors when the heat index reaches 95 degrees Fahrenheit.[1] Meteorologist Jeff Masters warned that "the combination of long duration, strong intensity, and high humidity makes this heat wave potentially deadly."[1] Historical data underscores this concern: between 1992 and 2024, at least 58 athletes nationwide have died from exertional heat stroke.[1]