POLICE are warning motorists to drive slowly, to be prepared for debris on roads and watch out for unreported fallen trees.
Drivers are also advised not to drive through flood waters after Derry city and the county took a pounding last night from Storm Frank as it swept in from the Atlantic.
Gusting winds and heavy rain made driving on roads treacherous.
Gale force winds brought down trees on the main road in Pennyburn Industrial Estate in the city last night.
The Peace Bridge in Derry remains closed until further notice because of the high winds.
High sided vehicles have been banned from the Foyle Bridge where a 30 mph speed limit has been imposed while the Amber weather warning remains in place.
The weather warning is expected to be lifted later today as Storm Frank moves towards Iceland.
The worst damage to the electricity supply happened around 9 pm last night.
The most badly affected area was in Co Derry between Limavady and Garvagh.
Power NI said more homes could be without power this morning but engineers will not know until they carry out a full assessment of the damage this morning.Tags: