Lingfield's National Hunt fixture on Monday has been abandoned due to standing water on the track.
Course officials called an 8am inspection for Sunday to assess conditions after persistent rain for a number of days.
A further 5mm fell during Saturday, with more overnight and another 5-10mm is forecast throughout Sunday.
Clerk of the course George Hill posted on Twitter: "Mon 22 Jan ABANDONED. HEAVY (Standing water & false ground in back straight). 1mm overnight (5mm total yest). F'cast: 5-10mm rain today with no chance of any improvement."