Heat wave warning issued for several states, list shows states that'll see warmer nights

IMD issued a heat wave warning for Bihar (April 21), Haryana, Chandigarh, Delhi, Punjab, east Rajasthan, Vidarbha, Chhattisgarh (April 21-24), west UP (April 21-25), west Rajasthan (April 22-23) and Madhya Pradesh (April 22-24). Haryana, Chandigarh, west UP, Madhya Pradesh, Vidarbha will see warmer nights on April 21. Maximum temperatures may rise 3-4°C over northwest India on April 21-24.