Tuesday's meeting at Lingfield is already in doubt and subject to a precautionary inspection at 8am on Monday.
While the track is currently raceable, the ground is heavy, soft in places on the chase course with further rain forecast on Sunday night.
Clerk of the course Neil Mackenzie Ross said on Sunday morning: "We have had another 12.8 millimetres of rain yesterday and the ground is very heavy.
"Potential further heavy rain could cause us a problem and there is as much as 10mm forecast tonight.
"We are raceable at present but we just want to make people aware that further rain could be an issue."