A low pressure off South Orissa and North Andhra Pradesh coast triggered heavy rains in the City and over many parts of the State on Sunday. The system is likely to become more marked and cause widespread rain over South Orissa during the next two to three days. The Met department said heavy to very heavy rains are likely over some parts of Orissa in the next 48 hours. Under the influence of the system, Balangir got 4 cm rain, highest for the day, while Bhubaneswar received as much. Puri recorded 3 cm rain. Western Orissa towns such as Bhawanipatna, Sambalpur and Hirakud received fairly good showers during the day. The torrential rains led to severe flooding across the Capital. Major stretches of Janpath, NH5 and low-lying areas of the City were waterlogged, thanks to the defunct drainage system.