Heat-wave days run from 0.3 a summer in Assam to 17.0 in Punjab, with Haryana at 16.7 and Jharkhand at 15.7. Only 19 states report all three years.
Policy implication Single years swing widely (Uttarakhand reported 15, 0 and 22 days in 2022, 2023 and 2024), so this three-year average is still a rough guide. Himachal Pradesh, Chandigarh, Kerala, Mizoram and Puducherry have missing years, and 12 other states and territories are not in the source at all.