A man who died after a tree fell on his car in Raphoe, County Donegal, has been named as 20-year-old Kacper Dudek.
The incident happened on the N14, north of Lifford, near Ballinalecky Cross, early on Friday.
The N14 remains closed and local diversions are in place.
Garda (Irish police) forensic collision investigators are carrying out a full examination of the scene on Saturday.
Meanwhile, the Republic of Ireland, about 528,000 customers are without power as of 08:00 local time on Saturday following Storm Éowyn, down from a peak of 768,000 earlier on Friday.
Status red gale warnings have ended in the Republic of Ireland, while a yellow snow and ice warning remains in place for Donegal until 09:00 local time.
A wind speed of 183kmh (114mph) brought by Storm Éowyn has been recorded in the Republic of Ireland, the fastest since records began, Irish forecaster Met Éireann said.
The water service Uisce Éireann is beginning restoration efforts for those affected by outages.