Fig. 13. Increase in the frequency and intensity of extreme heat events in different scenarios in different decades. The left column represents the reference for the 2010s. Red solid circles indicate the occurrence of the once every 10-year heatwave event in the 2010s. The red hollow circles fill the 10-year span. Therefore, in the projected scenarios, red solid circles represent the number of extreme hot events that we expect to see, reaching the level of once every 10-year events in the 2010s.