The Met Office has issued a new severe weather warning for Northern Ireland - where even more rain is forecast to fall on areas already flooded by Storm Desmond.
The total rainfall is only expected to be around 10-20mm, much lower than previous days, but could cause surface water flooding because the grounds are already saturated.
Firefighters have today rescued a man who was trapped in his van in flooded Charlemont, Co Armagh. He was treated at the scene but was not injured.
The heavy rainfall is expected to cross from the west on Wednesday afternoon, moving quickly.
The yellow warning applies to counties Armagh, Fermanagh, Londonderry and Tyrone.
The chief forecaster said: "The combination of rain and strong or gale-force winds will also give difficult driving conditions."
Meanwhile, the Republic of Ireland is preparing for the 'worst flooding in 20 years'
and has deployed military troops to the west and midlands.