Scottish Power says that some of the 500 homes are unlikely to be reconnected to the power network tonight. It say it is doing everything it can, but cannot guarantee they will have electricity today.
Llangollen is still the worst affected area with Mold also experiencing problems.
They say that engineers will work as late as possible to reconnect customers.
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A yellow 'be aware' warning has been issued by the Met Office for much of Wales.
Wales captain Ashley Williams admits panic will set in watching Gareth Bale in the Champions League final.
The heavy showers will ease during the first part of tonight, leaving a dry night with mist in places.