The Met Department said low-pressure production over the Bay of Bengal is likely to cause heavy rains in West Bengal starting Sunday.
Uttar Pradesh witnessed light to moderate rains in isolated parts of the state, he said.
In Kerala, the IMD issued a “red alert” for extremely heavy rains in the Idukki, Kannur and Kasaragod districts.
An area of low pressure is likely to develop over the northeast of the Bay of Bengal and the neighborhood around 20 September and, under its influence, widespread rains with isolated heavy to very heavy falls are likely over Kerala from the September 19-21, he said.
Various parts of the state have been receiving heavy rains in recent days.
Vadakara in Kozhikode received 10 cm of rain, while Hosdurg (Kasaragod) registered 9 cm and Taliparambu in Kannur and Kudulu in Kasaragod received 7 cm each according to the weather report this morning.
An orange alert (a warning indicating heavy to very heavy rains) was issued for eight districts on Saturday and six on Sunday.
In view of the alerts, the Navy, Indian Air Force (IAF) helicopters, Police and Fire Force are ready to go into action in case of any emergency request, the sources said.
In districts where the red and orange alerts were issued, people living in disaster-prone areas would be moved to camps as a precaution.
In Delhi, it has not rained for 11 days, which has raised the mercury in recent days.
The last time the Safdarjung Observatory, which provides representative data for the city, recorded any precipitation (1.3 mm) was on September 8.
On Saturday, the maximum temperature ranged from 36 degrees Celsius to 40 degrees Celsius in most of the city.
The national capital has recorded 78 percent less rainfall in September so far, according to IMD.
In West Bengal, the low pressure area is likely to move north towards West Bengal from the Ganges, causing
heavy rain in the coastal and adjoining districts of East Midnapore, South and North 24 Parganas, Howrah, Kolkata and Hooghly, the Met Department said.
The system is likely to bring heavy to very heavy rains in parts of Birbhum, East and West Midnapore and Jhargram districts, and heavy rains over the other districts of South Bengal from Monday.
The rains are likely to continue through Wednesday, he said.
The Department of MeT has forecast light to moderate storms accompanied by lightning most likely in isolated locations over the state on September 22.
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