Lough Erne has burst its banks in places around Enniskillen, amid concerns that the water level could continue to rise following further heavy rain on Sunday.
Water levels in Upper Lough Erne remain at a high level, with water overflowing into the grounds of the Lakeland Forum leisure complex in Enniskillen.
A number of roads in Fermanagh are impassable and in Enniskillen, where Upper and Lower Lough Erne meet, there remain pockets of flooding down at the waterside.
South of the border, parts of Limerick city were flooded yesterday as water levels in the lower and mid sections of the River Shannon continued to rise.
A school, a number of homes and an electric sub-station were caught in rising waters when a canal burst its banks in the Corbally area of Limerick.
Elsewhere in the city, cars belonging to a number of rugby fans who attended the Munster v Leicester Tigers game at Thomond Park on Saturday night were almost entirely submerged in water.
An increase in the flow of water from the Parteen Weir, which controls the Shannon’s level through Limerick, heightened the risk of flooding.