Several flights between Calcutta and Guwahati were cancelled on Friday because of heavy rain and waterlogging in the Assam capital.

Some flights to Guwahati were diverted to Calcutta because of the weather, said airport officials.

Four flights from Calcutta to Guwahati were cancelled on Friday. A similar number from Guwahati to Calcutta were also cancelled, said airport officials. IndiGo, Air India Express and SpiceJet operated the flights that were cancelled.

Heavy rainfall since May 29, along with strong winds, disrupted flight services at Guwahati airport, said officials.

The city, along with large parts of Assam, has been receiving heavy rainfall since May 29. Waterlogging has been reported from almost all localities in Guwahati, disrupting normal life.

The heavy rain is caused by a well-marked low-pressure area over the northwest Bay of Bengal off the Odisha coast, which is expected to intensify into a depression within 24 hours.

The India Meteorological Department (IMD) has issued a red alert for several districts in Assam and Manipur, warning of extremely heavy rainfall and winds.

The inclement weather also necessitated the diversion of several flights, some of which landed at Calcutta airport.

An IndiGo flight from Guwahati to Lucknow, carrying 195 passengers, was diverted to Calcutta in the afternoon. Another IndiGo flight from Chennai to Guwahati, carrying 220 passengers, was also diverted to Calcutta, said an official.

An Air India Express flight from Delhi to Guwahati, carrying 179 passengers and the airline’s flight from Chennai to the Assam capital with 175 passengers, were also diverted to Calcutta.

Several other flights, which could not land in Guwahati, were also diverted to Calcutta, said an airport official.

“There could be cancellations and diversions of flights to and from Guwahati on Saturday too,” said the official.