The ESB is estimating some Shannonside customers won't have their power back until Thursday evening.
These include homes in north Roscommon.
A fault affecting 14 customers in Crossna is among those that isn't expected to be fixed until Thursday afternoon at 4 o'clock - almost a week after they lost supply.
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Our reporter Eoghan Murphy has been speaking to Elphin councillor Valerie Byrne about the news.
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