LondonExtreme heat now bleeds into spring and autumn.
Heat outside peak summer catches unprepared people off guard.
The study compares 1980s and 2015-24 reanalysis data to track how heat has shifted into two-month shoulder periods.
Heat-health warning systems still use fixed seasonal windows the findings now challenge.
How each outlet framed it
- Carbon Brief
- first global study: extreme heat creeping into shoulder seasons (spring/autumn) unevenly by location, not just intensifying at peak
Sources: Carbon Brief