Thames Water said the power supply was cut off for safety reasons following the flooding.
According to UK Power Networks, 173 properties remain without power.
In an earlier statement, the spokesperson for Thames Water said: “All customers should have their water supplied restored although they may experience some intermittent loss of pressure whilst we carry out the repair, which will be complex.
“Our teams worked overnight and made good progress with the excavation to reach the damaged pipe.
“We understand how disruptive this situation is and sincerely appreciate your patience.”
Customer service representatives and loss adjustors were at the scene talking to those affected, Thames Water added.
A customer support van, which has been set up as a support hub outside All Saints Church on Caledonian Road, is due to reopen at 09:30 GMT on Thursday.
