Heavy showers lashed several parts of Mumbai and Navi Mumbai on Saturday and Powai Lake overflowed, even as the lakes from which the city receives its water supply are yet to get any significant rainfall.
K S Hosalikar, deputy director-general (western region) India Meteorological Department, said the offshore trough from south Gujarat to Kerala is persistently active, giving Mumbai good rains. “Such scattered heavy rainfall is expected to continue for the next few days. In fact several areas in south Konkan like Dapoli, Ratnagiri and Harnai have recorded very good rain,“ said Hosalikar. He added that rainfall recorded at both the Colaba and Santacruz observatories this year has been above normal.
Deputy municipal commissioner (general administration department) Sudhir Naik said, “According to information received from the hydraulic department, Powai, which is a small lake and fills faster, has overflowed.“ However, its water is only used for non-potable purposes.
The average rainfall recorded in Navi Mumbai between 4pm on July 1 to 4pm on July 2 was 137mm. Nerul recorded the most rainfall with 155mm, while Airoli received the lowest at 98mm. Of the five dams on the outskirts of Navi Mumbai, Hetawane received the highest rainfall of 132mm in the last 24 hours, while Ransai got the least at 31mm. Barvi dam, which supplies water to five municipal corporations like Thane, MiraBhayandar, Navi Mumbai, Ulhasnagar and Kalyan-Dombivli received its first official showers of the season with 56mm of rainfall.
The IMD has forecast that such weather conditions would remain for the next 48-72 hours.Citizens however would need to exercise extra caution as the next five days (July 3-7) are all high-tide days with the sea levels likely to go up to between 4.71 and 4.91 metres. Over the last few years it has been seen that if it rains continuously on high-tide days, it creates waterlogging problems as the seawater forces its way into the city.
While it has been pouring in Mumbai over the past few days, there appears to be a sharp disparity between rainfall received in the catchment areas located in parts of Nashik. Weathermen said rainfall has so far been deficient in parts of Madhya Maharashtra. “Parts of north Madhya Maharashtra like Nashik, Pune and Jalgaon are still in the deficient rain category .However, not all is lost as we are expecting rains in these areas as well in the coming days,“ added Hosalikar. Rainfall in lakes supplying water to Mumbai, from 6am-6pm on Saturday , was 107mm in Vihar, 90mm in Tulsi, 23.4mm in Modak Sagar, 66mm in Tansa and 32mm at Vaitarna.