Tim Field, of the Energy Network's Association, said about 50,000 homes were without power, but he expected the majority to be back online today. The figure was updated to 24,000 last night.
A spokesman for the Environment Agency said it had cut the number of severe weather warnings from three to two, both in southwest England, but warned it would take time for water to pass through the system.
Seventy-six residents of the Little Venice Caravan and Marina Park at Yalding, Kent, were evacuated by boat and 4WD vehicles by the Maritime and Coastguard Agency and Kent Fire and Rescue as water levels on the River Medway reached chest height and caravans were flooded.
A further 90 people were evacuated from homes on the River Stour near Bournemouth. Police evacuated residents of the Ilford Bridge Home Park after a severe flood warning.
One resident Pat Tapply, 79, said: "I would just like to know how bad it is. All the presents are by my fireplace, I don't know what they are but I hope they are still there when I can come back."
More evacuations were ordered in Tonbridge, Kent. People were also evacuated at Beaulieu Garden Park Home in Christchurch, Dorset.
The Environment Agency had 126 flood warnings in place across England and Wales, mainly in southeast England, the southwest and the Midlands. A further 218 flood alerts were also in place, with 90 in the Southeast.
The agency said 150 properties had been flooded in England, mainly in the south. Families had to be evacuated from homes in Dorking, Leatherhead and Guildford in Surrey, and 40 properties were evacuated in Godalming because of concerns over the height of the River Wey.
About 800 homes in the north of Scotland were still without power, mainly in Aberdeenshire and Elgin.
- Independent