In a survey of 170 elementary students in the Phoenix, Arizona, metropolitan area over August–September 2024 (the average maximum temperature during this period was 97°F; 36.1°C), students reported feeling "a lot hot" directly after recess in 45% of surveys—and higher perceived heat was associated with greater physical activity intensity, according to a study published in PLOS Global Public Health by Kylie Wilson from the University of Arizona Cancer Center, United States, and colleagues.