Worcester will hold a second inspection at 3pm ahead of Wednesday's meeting.
Clerk of the course Fergus Cameron took an initial look at 7.45am and while conditions have improved, there are still a number of concerns to address.
He said: "We've seen a significant improvement in the last 12 hours. The level of the river has dropped which has enabled the drain which was under water to be freed.
"We have lost 95 per cent of the surface water on the track and we are forecast a dry day, although there could be further rain of up to 12 millimetres between now and tomorrow evening.
"However, we currently have vehicle access problems. The first two furlongs are completely waterlogged in centre of track and the concern is whether we could provide access to emergency vehicles.
"We are investigating the options but under the circumstances, a second inspection is probably the best route to take."
