2026 marks the 10th consecutive year of record-breaking global temperatures, with the annual average 1.47°C above the pre-industrial baseline.
Heat is the deadliest weather hazard in the US, killing 3,500+ people each year. The 2026 summer is projected to be the most deadly on record.
Urban heat islands — created by concrete, asphalt, and buildings — make cities 2–5°C hotter than surrounding rural areas, multiplying health risks for residents.