Five counties have been hit with a Status Yellow rainfall warning as persistent rain batters parts of Ireland.
Met Eieann has put the warning in place for Donegal, Galway, Leitrim, Mayo and Sligo.
The counties in the north west are at risk of flooding, with coastal areas and hills to be the worst affected areas.
The yellow alert will be valid between 2pm on Wednesday and midnight on Thursday.
A warning said: "For the rest of Wednesday and all of Thursday, persistent and occasionally heavy rain at times with a risk of localised flooding.
"Amounts will be highest in coastal areas and on hills and mountains."
The national forecaster is predicting widespread rain in Ulster, Connacht and west Munster on Wednesday night.
However, it will still be mild and humid overnight, with lowest temperatures ranging between 10C and 13C.
A forecaster said: "Tonight will remain cloudy,with further outbreaks of rain, persistent and widespread in Ulster, Connacht and in west Munster, but more patchy elsewhere.
"Misty, with hill and coastal fog. Mild and humid. Minimum temperatures 10 to 13 degrees."
Thursday will be a warm day with highs of 20C - but western and northern counties will experience heavy bursts of rain.
Met Eireann said: "Thursday, will again be mostly cloudy, with outbreaks of rain across the northern half of the country, with some heavy bursts at times in western and northwestern coastal counties.
"Rain and drizzle will be patchy across the southern half of the country, with good dry intervals developing inland and a few bright spells in parts of the east and southeast.
"Maximum temperatures 14 to 20 Celsius, warmest in parts of the south and east and coolest in Atlantic coastal counties, with moderate to fresh southwesterly winds."
