According to UK Power Networks 450 people living in and around Harleston are affected.
Those living in IP20 0, IP20 9, IP21 4 and IP22 1 are experiencing problems this morning.
A statement on their website reads: “Our engineers are on their way. At this point we think the issue is an overhead network fault affecting 450 properties.
“Specialist engineers from our control room are also working to divert power remotely, so it’s possible your power could come back on at any point.”
Power is expected to be restored by 10am on Wednesday.