Manx Utilities says its lines have been very busy after "a potential burst" in Douglas.
The properties affected are reported to be in Cronk Y Berry/Glen Park, Governors Hill and Williston.
Manx Utilities said engineers are investigating and updates will be provided as soon as possible.
A company spokesman added: "Our lines are very busy and we apologise if you cannot get through".
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What's being done to tackle crash blackspots?
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No successful driving theory test appeals in past 10 years
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Steam Packet announces tomorrow morning's sailings will go on time
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How much has the Department of Infrastructure claimed for property damage?
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