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."
3 July 2015Cyclone set for Leopardstown outing
Chantilly off the radar for Test
Waady aiming to step up
Angel major Sandown doubt
Strong Gosden hand at Newmarket
Doyle up for the Challenge
Gatsby sets sights on Horn
Queen aiming to reign in Oaks
Gosden respects Golden rivals
Sandown team mull watering plans
Kazeem on comeback trail
Lennox option for Limato
Magnificent seven for Elliott
Pendleton thrilled with first ride
Balding hoping for Park August run
Kirby unscathed in house fire
Pilot charters path to York
Provenance has claims on Sandown
Soapy out to slay Dragon rivals
Spencer rides Gatsby in Eclipse
Space considered for Ascot return
2 July 2015Creighton discharged from hospital
Postulation checks in at Belmont
Charming thoughts turn to Doncaster
Deauville date for Diamond
Mecca's takes Thirsk honours
Dods waits on Angel decision
Soumillon takes Certain ride
Mile on Spear radar
September aim for Tryster
Cup aim for Arab
Time out for Hannon aces
Close encounter excites Doyle
Island to drop in grade
1 July 2015Muir keeps faith with Baz
Lynam ponders dual July raid
Geraghty targets weekend return
Pendleton swaps saddles at Newbury
Latharnach given Goodwood aim
More Stewart woe for Lynam
Time makes all the right moves
Canadian dream for Odeliz
Ground to dictate plans for Ribbons
Walsh remembers 'heavyweight' Kauto
Queen possible for Godolphin debut
Intilaaq in line for return
McCoy salutes 'amazing' Kauto
Nicholls leads Kauto tributes
Star put down after paddock fall
30 June 2015Towcester chief facing BHA charges
Down Royal proud to have seen Kauto
Nicholls leads Kauto tributes
Sad end for super Star
Doyle keen on Beau chance
Pontefract firsts for Hannon
Horn long odds-on for Eclipse
Frustration continues for Tudhope
Globetrotting Glance retired
Package heads for retirement
Falmouth caution for Integral
Stars on Leger course
Chase set for drop in class
Vintage option for Sails