By The IMD has issued safety advisories alongside its extremely heavy rainfall warnings for September 23.
People have been told to avoid waterlogged roads because of unpredictable depth and current.
Those outdoors during lightning were advised to seek shelter indoors and stay away from open fields and isolated trees.
The warnings cover Odisha, Andhra Pradesh and Telangana, driven by a deep depression over the Bay of Bengal.
Fishermen were told to avoid the sea along the affected coast.
The IMD said the system is expected to cross the north Andhra Pradesh-south Odisha coast between Visakhapatnam and Gopalpur, close to Kalingapatnam, by Wednesday night.
Coastal residents and fishermen were advised to treat marine warnings seriously and avoid venturing into the sea.
The IMD advised people to avoid waterlogged roads because of unpredictable depth and current.
People were also advised to seek shelter indoors during lightning and to stay away from open fields and isolated trees.
Local administrations in low-lying and drainage-prone areas were asked to stay alert.
The system follows an earlier spell of heavy rain over the same region on September 21-22, as the depression intensified over the Bay of Bengal.
Bengaluru was separately forecast to see thunderstorms with lightning and gusty winds of around 30-40 kmph.
Delhi-NCR was not under any rainfall warning for September 23.
The India Meteorological Department is the government’s nodal agency for weather forecasting and warnings.
Deep depressions of this kind are common over the Bay of Bengal during the post-monsoon and late monsoon period in September and October.
The IMD tracks such systems using satellite imagery, weather radar and a network of surface observation stations.
State disaster management authorities typically coordinate evacuation and relief measures in areas expecting extremely heavy rainfall.
Rivers and low-lying areas near the coast are especially monitored for flooding during such weather events.
Bay of Bengal weather system (representative satellite image), Wikimedia Commons, public domain
