Hyderabad and parts of Telangana witnessed a sudden downpour yesterday, catching off-guard many people who had ventured out for a holiday outing. The rain did provide much-needed relief from the heat that dominated the earlier part of the day. As per the Telangana Development Planning Society’s report, Ramachandrapuram and Patancheru recorded rainfall of 56.5 mm, Jubilee Hills 35 mm and Chandanagar and Serilingampally 33.3 mm. Kisteradipet of Sangareddy district recorded 69.3 mm rainfall, followed by 56.5 mm at Ramachandrapuram and Gandipet 54.8 mm. Meanwhile, the IMD has issued a thunderstorm alert for 17 districts for today.