Table 3.

Definition of heatwave indices used in the present study.

Index	Description	Unit
AHW	Area experiencing Heatwave	km2
DHW	The maximum length of heatwaves	days
THW	Tmax in heatwave days	°C
CTHW	The growing temperature during heatwaves	°C
HWI	Heatwave index (% of the area covered by the number of heatwaves)	–
AHWN	The area experiences Tmax and Tmin more than a threshold	% of the total area
DHWN	Duration when Tmax and Tmin are more than a threshold	Days
THWN	Tmax during heatwaves at nighttime	°C
CTHWN	The cumulative temperature during heatwaves at nighttime	°C