Environment Agency: 'Potentially serious effects'published at 08:57 Greenwich Mean Time 13 January 2017
Environment Agency chief executive Sir James Bevan said he did not think today's storm would be as powerful as the one that caused the east coast flood of 1953 - described as the worst national peacetime disaster to hit the UK.
However, he told BBC Radio 4's Today programme there could be "potentially significant effects" including flooding.
He said: "It's very important to underline that there are two high tides today coming down the east coast, north to south.
"The first is coming in at the moment slightly under the height that we expected, the second, due this evening, may come out slightly higher than has been anticipated.
"We will stay very active throughout the day on the ground, we will continue to warn and inform the communities that are at risk, and I would like to urge everybody to remain vigilant and to continue to follow our flood warnings."