For how we live.
One study screened 916,904 acute-care visits to find which diagnoses actually rise with extreme heat. Another, in Phoenix, asks a prior question: who calls for help at all.
Two papers landed the same day. An attribution analysis puts children aged 0–9 at roughly three times the added humid-heat exposure of people in their sixties; a German cohort counts the emergency visits.
A players' association says arm injuries more than doubled this year. A 46-year analysis of tour matches finds a slower, steadier rise. Both can be true, and neither settles the calendar question.
FIFA gave every World Cup match a mandatory three-minute break and the ATP set its first WBGT thresholds. Physiologists who study cooling say three minutes in direct sun does little to core temperature.
Dallas has held 105°F for five straight days, Texas drought jumped 20 points in a week, and more than 70 million people have been under heat alerts — with little rain in sight.
WMO puts 2025 at 1.44°C above pre-industrial, second or third warmest depending on the dataset. The 2023–2025 mean of 1.48°C is the figure that describes exposure.
A year of wearable data from 76 subsistence farmers shows adaptation happening in real time. The women in the study had less room to slow down, and their strain readings show it.
A WHO and Brazil special report released on the summit's Health Day says extreme heat kills over 540,000 people a year and that health facilities face 41% higher weather-damage risk than in 1990.
A study of 5,459 municipalities projects annual costs of $228-264 million by mid-century, with the largest absolute burden in the South and the fastest relative growth in the North.