Met Éireann has issued a severe weather warning, saying that a major storm will affect all parts of the country during Wednesday and Thursday.
The weather service says that some structural damage can be expected.
Winds that will initially be mainly between northeast and southeast in direction will reach mean speeds of between 45 and 55 miles per hour, with gusts of 70 to 80 miles per hour. The wind may veer southerly on the south coast later.
Structural damage, such as fallen trees, can be expected.
Rainfall totals in excess of 50mm over a wide area will lead to some severe flooding, due to the already saturated ground.
Some parts of Munster and south Leinster could see rainfall totals of up to 80mm.
High seas and high tides will lead to coastal flooding, particularly in the south and east of the country.