Flood warnings are in effect across Wales following the arrival of Storm Isha on Sunday, resulting in power outages in hundreds of homes. A wind gust of 90mph (144km/h) was recorded in Capel Curig, situated in Eryri, also known as Snowdonia, while Aberdaron in Gwynedd experienced winds of 89mph (143km/h). A yellow wind warning covering the entire UK remains in place until midday on Monday.

An amber wind warning, initially encompassing all of Wales, has been lifted. At one point on Sunday, over 3,000 properties throughout the country faced power cuts. As of Monday morning, approximately 200 homes in south and mid Wales were still without power, according to the National Grid. While Scottish Power did not provide specific figures for north Wales, its power cut map indicated several affected postcodes.

Natural Resources Wales (NRW) has issued numerous flood warnings and alerts across the country. Dylan Williams from NRW urged people to stay vigilant and check their website for updates, stating, "A lot of this happened through the night, so today we will be assessing the damage."

Overnight, fire services responded to multiple incidents, including isolated flooding in Ystrad Mynach and Blackwood in Caerphilly. Reports also emerged of individuals stranded in floodwater at Capel Curig and Betws y Coed in Gwynedd. The coastguard issued a caution for coastal areas, advising people to stay away from cliffs, be mindful of tidal surges, and avoid large waves.

The storm has led to extensive travel disruptions, resulting in road closures and flight cancellations. The Met Office anticipates continued disruptions throughout Monday morning, warning of potential damage to buildings, power cuts, and the risk of injuries from flying debris. Large waves and beach materials may pose dangers to life along sea fronts, coastal roads, and properties. Storm Isha marks the ninth named storm to impact the UK since the season commenced in September. Each storm receives a name when it poses a risk, with names assigned in alphabetical order.