Meanwhile London Gatwick Airport was struggling with power outages in parts of its North Terminal, causing delays to departing flights.
High winds and heavy rain battered parts of Europe on Monday and yesterday, with some areas still reeling from the aftermath.
The Energy Networks Association said around 50,000 homes remained without electricity. They are largely in the east and southeast of England.
"It's likely that some people will still be off on Boxing Day (tomorrow)," said spokesman Tim Field.
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In southeast England, evacuations took place in the London commuter belt towns of Dorking, Leatherhead, Guildford, Godalming and Tonbridge, emergency services added.
Meanwhile the coastguard rescued people from a caravan park in Yalding, after chest-deep river waters cut the site off.
All together, hundreds of people were evacuated, emergency services added.
However, "there are still power outages in parts of our North Terminal," it said, due to the weather.
"These are causing delays to departing flights and our engineers are on site rectifying this."
All departures were operating from the South Terminal, except for British Airways flights.