Weather forecasters are warning of up to four inches of flooding around harbours in Douglas, Castletown and Ramsey tonight.
A large high tide combined with rain and strong winds mean a yellow warning has been issued.
It means inner harbours could be under four inches of water shortly after 11.30pm.
Areas expected to be affected include Hope Street Castletown, the Tongue in Douglas and Mezeron Corner in Ramsey.
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