Large parts of Europe look set to suffer a month of heatwaves each year

Number of hot days at different levels of global heating each year

1C global heating (current level is 1.2C)

Annual heatwave days

15

25

35

45

0

2C global heating

1C global heating (current level is 1.2C)

2C global heating

Annual heatwave days

15

25

35

45

0

1C global heating (current level is 1.2C)

2C global heating

Annual heatwave days

15

25

35

45

0

Guardian graphic. Source: Climate Dynamics report by Ruosteenoja and Ruosteenoja. Note: 1961-2000 level is defined as the 90th percentile for the number of heatwave days across this range. Average is across 20 years. Breaks of at most one day within a heatwave event were allowed in the research. Some areas excluded due to the incomplete E-OBS data