Saturday's meeting at Fairyhouse has been called off due an unraceable track.
An first inspection ahead of the card, which was set to feature the Grade Three Race Displays Mares Novice Hurdle, was carried out at 3pm on Friday, with officials deciding to take another look at 7.30am on Saturday due to the forecast.
An Irish Horseracing Regulatory Board statement said: "Following an inspection this morning at Fairyhouse, parts of the track were found to be unfit for racing after 12mm of rain overnight and the meeting scheduled to take place today (Saturday) has been cancelled."
Sunday's meeting at Naas is also under threat, with another classy fixture subject to an inspection on Saturday afternoon.
The IHRB added: "Furthermore, there will be a precautionary inspection at Naas at 3pm this afternoon ahead of the fixture scheduled to take place tomorrow."