Dangerous heat stress events will spread rapidly across the world as global heating continues

Estimated frequency of one heatwave with at

least six hours of non-compensable heat

Once every:

5

10

15

20

25

100 years

1C warming

2C warming

3C warming

Estimated frequency of one heatwave with at least six hours of non-compensable heat

Once every:

5

10

15

20

25

100 years

1C

warming

Each dot is a weather station

2C

warming

3C

warming

Estimated frequency of one heatwave with at least six hours of non-compensable heat

Once every:

5

10

15

20

25

100 years

1C

warming

2C

warming

3C

warming

Guardian graphic. Source: Powis et al, Science Advances, 2023. Weather station data from the Met Office HadISD database. Note: map has been cropped when viewed on smaller devices