Structural damage, fallen trees and power cables along with blocked roads all now need to be dealt with in a massive clear-up operation.
Here are just some of the scenes from around Northern Ireland on Monday.
1. Storm damage
Fallen cables on the main Enniskillen to Bellanaleck Road, Co Fermanagh. Photo: Ronan McGrade / Pacemaker
2. Storm damage
Trees and fences were blown down throughout many parts of Co Fermanagh. Damaged fences can be seen at Forthill Road, Enniskillen. Photo: Ronan McGrade / Pacemaker
3. Storm damage
A worker clears fallen cables after a tree was cleared on the main Enniskillen to Bellanaleck Road, Co Fermanagh. Photo: Ronan McGrade / Pacemaker
4. Storm damage
Workers at Massereene Golf Club begin clearing away a fallen tree on the Lough Road, Antrim on Monday morning following the devastation of Storm Isha. Photo: Stephen Davison / Pacemaker