Wales weather: Residents hope for power after 109mph storms 29 December 2013 Last updated at 13:46 Shop owner John Elfed Williams in Aberdaron says he cannot trade Engineers have been working to restore power to the last remaining homes in north Wales still cut off following the Boxing Day gales. With Anglesey and Gwynedd hardest hit, ScottishPower had reconnected more than 20,000 properties by Saturday evening. The company said a "very small pocket" of properties remained without power at 12:30 GMT on Sunday, but added they would be re-connected during the day. Meanwhile the Met Office has issued a yellow alert for heavy rain on Monday. A flood warning for the Lower Dee Valley was lifted on Sunday, leaving one flood alert in place for rivers in south Pembrokeshire as of 13:30 GMT on Sunday. Road problems The high winds had caused a string of incidents of structural damage, including slates falling into the Maes in Caernarfon and in Bangor High Street. I think people have realised that the emergency workers are working flat out to get things sorted  End Quote Gareth Roberts Gwynedd councillor In south west Wales fire crews had been called out to a number of towns in Pembrokeshire and Carmarthenshire to deal with falling slates and chimney stacks. Council workers across Wales spent much of Friday and Saturday clearing fallen trees from roads. In Gwynedd, the B4573 was still closed in both directions between Harlech and Tygwyn on Sunday because of a fallen tree and power cables but there were no other major travel disruptions in the county. Ice on the roads was a problem in south Wales on Sunday morning, with fire crews dealing with a number of minor collisions. Arriva Trains Wales said a replacement bus was still operating between Harlech and Pwllheli on Sunday due to damage to a river bridge at Llandecwyn. ScottishPower said it was working to reconnect homes and businesses which have lost power during the gales, cancelling all non-essential maintenance work and bringing in extra contractors. The company has reconnected more than 20,000 homes across north and mid Wales since the storm hit. Aberdaron in Gwynedd was hit by the strongest winds Gwynedd councillor Gareth Roberts, from Aberdaron, said "quite a few" electricity poles had been blown down. He added: "People that have seen the poles have said they look very rotten inside. They look fine from the outside, but on the inside they're mush apparently. Maybe there are questions to ask over whether this could have been avoided with a better replacement policy. Mr Roberts said most properties had been reconnected by Saturday and a few farms in more remote areas were due to have power restored by lunch time on Sunday. He added: "Overall, it could have been a lot worse. We're used to electricity cuts around here - it's not unusual because we are so exposed. A day without electricity is no real hardship, but when you go into two or three days, and it starts to affect peoples' freezers and so on, it becomes a bit tedious. I think people have realised that the emergency workers are working flat out to get things sorted. You have to take your hat off to people who go out in that kind of weather to get the power back on. In response to claims about the condition of its poles, the company said: "ScottishPower carry out regular inspections on our network and have a ongoing investment programme to make sure our network is in good condition." Meanwhile the Met Office has issued a yellow alert ahead of heavy rain and wind on Monday, with Wales, south west England and Scotland predicted to be the worst affected areas of the UK. Heavy rain is expected to spread across south Wales and south west England on Sunday night into Monday morning. Winds of 60 to 70mph are likely in Wales, and up to 80mph in exposed parts of west Wales.