Four thousand homes remained without power on Friday morning as 75mph winds swept across the southern and eastern counties of Northern Ireland.
Gale force winds which began on Thursday evening continued into Friday.
While forecasters yesterday predicted the winds will ease by the afternoon, the Met Office said the warning for heavy rain and high winds remains in place until 7pm.
Damage includes trees down across powerlines and broken electricity poles.
There are a number of road closures in counties Antrim, Down, Tyrone and Londonderry.
Motorists are advised to visit www.trafficwatchni.com fort he latest updates and exercise caution when travelling.
Julia Carson, NIE Communications Manager said: “We have engineers and emergency crews currently working in difficult weather conditions.
“Overnight we restored power to over 20,000 customers and are continuing to assess the damage and carry out repairs in Counties Down, Armagh and Antrim.
“As the weather warning is in place until this evening, we may see more damage to the network through the day and the number of customers affected may rise.
“There may also be some areas where we will need to wait for the high winds to abate to allow our emergency crews to work safely.
“We would like to remind customers that if they do lose electricity supplies they should contact the NIE Customer Helpline on 08457 643 643 or report the fault online at nie.co.uk. Follow us on Twitter @NIElectricity for further updates.”