In Northern Ireland 7,000 electricity customers lost power as strong winds wreaked havoc with the supply network. Engineers managed to get 5,000 back on the grid, but by 10pm were still working to restore supply to the remaining 2,000.
Northern Ireland Electricity said it had responded to around 200 incidents of damage to the network in northern and eastern areas of the region.
Damage included trees coming down across powerlines and broken electricity poles.
Julia Carson, NIE communications manager, said some customers could be without power throughout the night as it was too dangerous to carry out certain repairs while storms raged.
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