Berhampur: The spectre of a possible flash flood is looming large over Ganjam and Gajapati districts, as heavy rain lashed both the districts under the influence of severe cyclonic storm Arnab, which made landfall in Andhra Pradesh on Wednesday.The highest rainfall was recorded at Mahendragiri (249.9 mm) in Gajapati district in the past 24 hours ending at 8.30 am, with 182.4 mm in Mohana, 135 mm in Gumma, 128 mm in Goshani, 140 mm in Paralakhemundi, 105.8 mm in Kasinagar, 106.2 mm in Rayagada and 96.8 mm in R Udayagiri.Similarly, in Ganjam district, 161.4 mm rain was recorded in Ganjam block during the period. The other areas received significant rainfall during the period: 154.6 mm in Chhatrapur, 139.5 mm in Digapahandi, 114 mm in Sanakhemundi, Gopalpur NAC (107.8 mm), Berhampur (132.4 mm), Kukudakhandi (127 mm), Rangeilunda (92 mm) etc.Due to heavy rainfall in catchment areas of major rivers, the water levels of the rivers and major reservoirs are likely to increase, water resource engineers said. Meanwhile, water from Baghalati reservoir was discharged due to its overflow.“Field engineers and administrative officers are monitoring water storage and discharge levels across all major river dams and reservoirs,” said Ganjam collector Keerthi Vasan V. “There is no need to panic as the district administration is taking all necessary steps to tackle any eventuality,” he said.