Criteria for Heat Wave

Heat wave need not be considered till maximum temperature of a station reaches at least 40º C for Plains and at least 30ºC for Hilly regions.
a) When normal maximum temperature of a station is less than or equal to 40º C
Heat Wave Departure from normal is 5º C to 6º C
Severe Heat Wave Departure from normal is 7º C or more
b) When normal maximum temperature of a station is more than 40º C
Heat Wave Departure from normal is 4º C to 5º C
Severe Heat Wave Departure from normal is 6º C or more
c) When actual maximum temperature remains 45ºC or more irrespective of normal maximum temperature, heat wave should be
declared.

Nearby pages
Critias, Critical Injury, Critically Endangered, Criton, Croatia and Slavonia, Croesus, Cromarty