Evacuation centres have opened in Wigan, Stockport and in Ormskirk, Lancashire, to support those who had to leave their homes.
Four hundred residents had to be evacuated from flats at Meadow Mill in Stockport after water flooded the car park and lower floors. The rescue operation lasted 12 hours.
Despite the water now subsiding, people said they had been told they may not be allowed to return to their properties until Friday due to the clean-up work and power being restored to the building.
Five hundred residents also had to be evacuated from the Britannia Hotel in West Didsbury.
