Wetherby's meeting on St Stephen's Day must pass an 11am inspection on Christmas Eve with the track waterlogged in places.
15 millimetres of rainfall fell on Saturday and although forecasts are conflicting, more rain could also be on its way in the next few days.
Officials at Chepstow will wait until Christmas Eve before deciding when to inspect for their Coral Welsh National meeting on Thursday.
The Monmouthshire course has been hit by substantial rainfall in the last week ahead of the track's most high-profile fixture in the calendar.
The course is currently waterlogged in places and there is more rain on the way.
Themeetings at Huntingdon and Sedgefield on St Stephen's Day are subject to inspections.
Huntingdon's meeting is subject to a 12pm inspection on Christmas Eve.
The Cambridgeshire venue is partly flooded following 16 millimetres of rainfall on Saturday. More rain is also on its way in the next 24 hours.
Sedgefield must also survive an inspection at noon on Christmas Eve following torrential recent rain.
64 millimetres fell from Wednesday to Thursday evening was exacerbated by another 16mm on Saturday.
Although the forecast is favourable, there is currently standing water on the track.
