The Stephen's Day meeting at Huntingdon has been abandoned due to a waterlogged track.
Officials were left with a straightforward call after inspecting the course shortly before midday on Sunday.
The Cambridgeshire venue is partly flooded following 16 millimetres of rainfall on Saturday. More rain has also been forecast.
Sedgefield's must also survive an inspection at noon on Christmas Eve.
Sixty-four millimetres of rainfall 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.
Fifteen millimetres of rainfall on Saturday has left Wetherby still waterlogged in places.
Although forecasts are conflicting, more rain could also be on its way in the next few days and racing at the Yorkshire circuit is in doubt.
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.
Sedgefield's clerk of the course. Phil Tuck. said on Sunday morning: "The forecast has improved and it's windy today, which is helping to dry the track.
"We are 90% raceable, but there is a bit of standing water we need to get rid of.
"I'm certainly a lot more hopeful than I was a few days ago.
"If this wind keeps up, there'd be good chance we might be OK by tomorrow."