Heat waves are disasters having greater than normal temperature for a prolonged period. The IMD has defined limits

Limits when termed "Heatwave vs coldsb flow: | Level | Plains | Coastal | Hilly areas | | When termed | 40°C | 33°C | 20°C | Heattime vs coldwalk heat: (1) Thousand in intensity: 2023 was the hottest year of the last decade IMD (2) Frequency per annum: have improved from once to twice in events (3) Duration: has increased drastically from few days to few weeks, so seen diary heat wave in Mumbai, Kolhata, livermore.

Yet heatwave need to called as justified disaster: (1) Allow fund allocation from National Disaster Relief Fund (2) Allow NDMA to undertake detailed study and defence guidelines for adaptation (3) Notification can help enforce beyond zoning, policy flying ie Green Buildings by GKHA (4) Striptive measures can be taken: ie) Cool ventilated building | Trunk's Cool Action Plan (5) Help directly inter-agency coordination (6) Study the relation with climate, Red Movement (6th Pillar & 3rd decade) With rising temperature, urgent SKBs like community planning, livelihood changes and discussions are needed to deal treatments