Today: Mumbai reaches 36 °C, Delhi 34 °C under dry skies

Mumbai and Chennai face the strongest heat strain

Mumbai is the hottest of the four cities today, with a forecast high of 36 °C and a low of 27 °C. The hourly forecast shows 31 °C at 09:00, then 36 °C at both 12:00 and 15:00, with Extreme Heat listed at those two hours. Rain is not expected: precipitation is 0 mm, with a 10 % chance.

Chennai reaches 33 °C from a low of 27 °C, and its Heatstroke Index (WBGT) reads Severe caution, a higher level than Mumbai's Caution. Humidity in Chennai is 59 %, with a 20 % chance of rain and 0 mm expected.

Delhi and Lucknow warm up from cool, sunny starts

Delhi begins at 22 °C at 06:00 under sunny skies, reaches 26 °C at 09:00 and 32 °C at 12:00, and is forecast at 34 °C at 15:00, matching its daily high. Precipitation is 0 mm with a 10 % chance, daily humidity is 34 %, and the Heatstroke Index (WBGT) is Attention.

Lucknow goes from 23 °C at 06:00 to 28 °C at 09:00 and 32 °C at 12:00, which is also its daily high. The day is sunny with 0 mm of rain and a 10 % chance, and the Heatstroke Index (WBGT) is Caution.

Air quality differs by city; Delhi rated Poor for activity

Delhi's air quality is Moderately Polluted for the day, and the category is the same at 06:00 and 21:00. Lucknow is also Moderately Polluted for the day, but its hourly category is Good at 12:00 and 15:00. Chennai and Mumbai are both Lightly Polluted for the day.

The Activity Index is Poor in Delhi, Chennai and Mumbai, and Slightly poor in Lucknow. The Driving Index is Excellent in all four cities, and the Clothing Index points to short sleeves in each of them.