Tuesday's twilight meeting at Chelmsford had to be abandoned after five races due to adverse weather conditions.
The Essex circuit was due to stage a seven-race all-weather card, but strong winds threatened proceedings from an early stage.
Officials, horses and jockeys managed to get through the first five races, but with conditions worsening, the decision was made to call off proceedings without running the final two events.
Exeter had earlier abandoned its scheduled six-race card because of waterlogging.
The course failed an early-morning inspection for the jumps meeting, which was called off shortly after 6.30am.
Almost 15mm of rain in the previous 24 hours had left standing water on already heavy ground.
Racing did go ahead at Fairyhouse, however, after that course passed its inspection.
Wednesday's card at Plumpton will be subject to an 8am raceday inspection.
The going at the Sussex course is described as heavy, soft (in places) following 10mm of rain overnight on Monday - with up to a further 12mm forecast before racing.
Newbury's meeting on Wednesday must also survive an 8am precautionary inspection after plenty of rain hit the track on Monday and Tuesday.
Further rain is expected before it is forecast to ease off from around 7am.