Met Éireann has issued a rainfall warning for Connacht and six other counties across the northern half of the country.
The Status Yellow warning covers the five counties in Connacht, as well as Longford, Louth, Westmeath, Meath, Cavan and Monaghan.
It comes into effect from 9pm tonight until 9pm on Tuesday night.
Met Éireann says that heavy rainfall will lead to accumulations of 30 to 50mm, with higher accumulations in mountainous areas, bringing a risk of some river and localised flooding.