This was the scene at Laxey just ahead of lunchtime's high tide.
Promenades and roads around the Isle of Man have been closed and members of the public are being warned not to put themselves in danger.
A severe flood warning is in force as strong winds and high tides combine in a storm surge expected to be worse than the 2002 floods that resulted in £8million worth of damage.
Emergency services are working with the Department of Infrastructure but property owners and motorists are being warned to take steps to protect their own property and move vehicles away from areas likely to be hit by the tidal surge.
Sandbags are being issued. Members of the public who need assistance other than an emergency are being advised to contact the DOI on 850000.
Rough seas mean waves more than four metres tall are crashing on to the coastline.
Port Erin police sergeant Gary Heaton said: 'We would also ask that whilst we understand that the high tides are out of the ordinary, our advice is not to put yourself in danger and to stay away from places where the flooding will take place, particularly around harbours and promenade areas.'
Earlier, a DOI spokesman warned: 'We will not be able to stop the flooding.'
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