The Guardian view on the climate crisis and heatwaves: a

Britain may be chilly, but from Greece to India, people are dying due to record temperatures. The death toll will grow without urgent action

While Britons don jumpers and complain about the unseasonable cold, much of the world has been reeling due to excessive temperatures. India has been in the grip of its longest heatwave in recorded history, with thermometers hitting 50C in some places. Greece closed the Acropolis in the afternoon last week as temperatures hit 43C; never has it seen a heatwave so early in the year. Soaring temperatures in the Sahel and western Africa saw mortuaries in Mali reportedly running short of space this spring, while swathes of Asia suffered in May.

Mexico and the south-west of the US have also endured blistering conditions; it was particularly shocking to hear Donald Trump pledge again to “drill, baby, drill” at a rally that saw supporters taken to hospital with heat exhaustion. These bouts of extreme weather are increasing as the climate crisis worsens. Although the El Niño weather pattern contributed to heatwaves over the last 12 months, they are becoming more frequent, extreme and prolonged thanks to global heating. By 2040, almost half the world’s inhabitants are likely to experience major heatwaves, 12 times more than the historic average.