On April 17, 2026, Delhi recorded its hottest day of the season, with a maximum temperature of 40.3 degrees Celsius, which is four degrees above normal. The India Meteorological Department (IMD) forecasts an increase in temperatures, predicting a high of 42 degrees Celsius on April 18. Alongside the heat, the air quality in Delhi remains a concern, with an air quality index (AQI) of 226, classified as poor. The IMD has implemented preventive measures under the Graded Response Action Plan (GRAP) Stage-I due to the deteriorating air quality. Residents can expect scattered rain and thunderstorms, which may help improve air quality temporarily. The minimum temperature is projected to rise slightly, with predictions of 22-24 degrees Celsius. Historically, April has seen higher temperatures, with the all-time April record reaching 45.6 degrees Celsius in 1941. However, no heat wave is expected in the upcoming week.