Four weather warnings are now in place for today and the early hours of tomorrow.
The latest is an amber warning for high tide later, which could see flooding in inner harbours between 10pm tonight and 1am on Tuesday, October 27.
High tide at around 11.30pm could see a storm surge in the Irish Sea flooding West Quay, East Quay, Parliament Street, Dale Street, Shipyard Road and along the River Sulby to Gardener's Lane in Ramsey.
Also at risk are the eastern end of North Quay, the Old Castletown Road and Lake Road in Douglas - and flood defences will be deployed around Castletown Harbour.
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