Emergency crews are cleaning up after a storm bearing record-breaking winds left at least one person dead and more than a million without power across the island of Ireland and Scotland.

Record high winds from Storm Eowyn battered Ireland and Northern Ireland on Friday, leaving one man dead and almost one-third of Irish homes and businesses without power and forcing the cancellation of hundreds of flights.

The storm had knocked out power to more than half a million utility customers by early Friday as it moved across Ireland.