Chennai is under active thunderstorm threat on May 12, with the IMD forecasting lightning, gusty winds of 30-50 kmph, and generally cloudy skies. Maximum temperatures will range between 35-37°C with minimums of 27-29°C.
Coastal humidity will keep the feel index significantly higher than actual temperatures. Residents should secure loose objects and avoid open ground during the storm windows, which are most likely during the afternoon and early evening.
Waterlogging is possible in low-lying areas if heavy rain accompanies thunderstorm cells.