Thursday's meeting at Wincanton has been abandoned due to a waterlogged track.
Clerk of the course Barry Johnson initially called an inspection for raceday morning after substantial overnight rain.
However, he brought that check forward to 12.30pm following further rain, before eventually calling the meeting off around 12 noon.
Johnson said: "We've had 34mm of rain since one o'clock and it's still raining.
"I have never seen it so wet. There is more rain forecast for Thursday and we have no chance of recovering in time for racing."
Officials at Hereford have also been forced to abandon their National Hunt fixture.
Clerk of the course Keith Ottesen announced a lunchtime inspection earlier this morning following persistent rain, and to make matters worse a culvert (a type of drain) that runs through the centre of the course has burst.
Ottesen said: "It's been getting worse and we're up to 27 millimetres of rain now. We weren't expecting anywhere near that amount."
He added: "Up to 7am we'd had 14mm but as it carried on raining all of the water from the surrounding areas and the water courses are culverted and can't cope with it all.
"We are flooded in parts because those water courses that take the water around the racecourse and underneath it have been breached. The ground everywhere is saturated and cannot take this amount of rain in such a short space of time."
22 October 2014Gosden a Fan of Newmarket scorer
Northern aces face off in Cumbria
December date for Balding memorial
Murphy plagued by shoulder injury
Dynaste charts direct Haydock route
O'Brien outlines Breeders' plans
Deputy outgunned at Fontwell
Wetherby-bound Taquin to duck Power
Whisky chasing Power spoils
High hopes for Adelaide run
Burke maps out Odeliz targets
Present sights set on Power prize
Gilgamboa waits on ground
New category for all-weather champs
Moviesta has sales date
National aim for O'Neill star
Cheltenham on Ginge agenda
Lewis eyeing Dubai success
Henderson handed Ascot role
Dandino misses Cup date
Panther given Breeders' go-ahead
Plain sailing for perfect Storm
Big Easy sets sail for Open fixture
Hall monitored for Giant Bolster
Stomachion in November frame
Hughes revels in 'sweet' success
BHA moves to address small fields
Connell turns to Heskin
Integral to race on next year
21 October 2014Storm breezes to Exeter victory
Moore concedes title to Hughes
Meade maps out gameplan for stars
Pele poised to tackle Hennessy
O'Neill sure of Taquin redemption
Heron seeking Great prize
Court to go on Trial
Saviour blow for Skelton
Dan makes chase debut
Moore waits on Grugy decision
O'Neill outlines That choices
Conn possible for Auction bid
Power team weigh up options
Bangor cancel schooling card
No rushing back for Long Run
Dynaste leads Old Roan contenders
Grands Crus retired
Exciting Berlais heads to Chepstow
Force handed Hong Kong mission
Park favourite for Trophy hunt
Al Kazeem team eye Hong Kong trip
Commemorative bound for Breeders'
Slade eyeing victorious swansong
20 October 2014Chelmsford City handed 58 fixtures
Alderwood to take two-mile test
Dynaste leads Old Roan contenders
Hennessy aim for Clouds
Fiesolana on Breeders' trail
High-class possibilities for Trophy
Chelmsford City handed 57 fixtures
French option for Maarek
Billy back for chasing bow
Judge to bid for Breeders' glory
Pipe mulls Moon target
High hopes for Holywell
Judge in Breeders' frame
Hill stars for Stoute and Moore
Gabriel lifts Garnet for Deegan
New One back with a win
Light career hangs in balance
Stars shines on hurdling debut
King big guns ready to start
Tullius camp consider options
Doyle unlikely to appeal Ascot ban
Mullins prepares formidable team
19 October 2014New One breezes to victory
Lavelle has Becher plan for Lodge
Riches heading on road north
Down Royal plan for Tiger
New makes Kempton return
Panther hunting Canadian prize