The first named storm of the season has brought gusts of wind of up to 79mph (128kph), which was recorded at 7pm on Sunday in Roche’s Point, Co Cork, according to Ireland’s meteorological service Met Eireann.
It has also disrupted more than a dozen flights at Cork Airport, which were either cancelled or forced to divert to Dublin or Shannon.
A round trip to Heathrow from Shannon Airport was also cancelled due to poor weather.
Meanwhile, power cuts have been reported in southern Ireland, parts of Wales and South West England.
Western Power Distribution later confirmed to Sky News that at least 115 houses were without power.
Rail passengers were also warned to expect delays, as National Rail said it had imposed overnight speed restrictions in South West England and South Wales, and Irish Rail said it had done the same around the Cork region.
A red wind warning was imposed in Co Kerry for three hours between 4pm and 7pm on Sunday evening, while the rest of Ireland was placed under orange and yellow alerts.
Kerry County Council said on Twitter it had deployed crews to respond to reports of fallen trees, and encouraged “continued vigilance” into the evening.
A yellow alert is also in place for Wales and the South West of England until Monday morning.
According to the Met Office, damage to temporary structures could be possible in the worst-affected areas as strong gusts of wind up to 70mph are expected overnight.
