Wednesday's meetings at Wetherby and Fontwell have been abandoned due the weather.
Wetherby officials had initially called a 2pm inspection for Monday but the track saw a further half-inch of rain on Sunday night which added to their problems.
With parts of the course already under water, they had had little choice but to make an early decision.
Speaking on Monday, clerk of the course Jonjo Sanderson said: "After Saturday night's rainfall we needed things to regress, but they didn't and we had another half of an inch of rain overnight. It's also been raining either heavily or steadily all morning.
"There is further heavy rain forecast later, amounting to 20 millimetres. We are already flooded and it's going to get worse. From experience I know we need four or five days for it to dry out."
Fontwell clerk of the course Ed Arkell had also planned a Monday afternoon inspection but a reported 20 millimetres of rain in the last 24 hours took its toll.
Arkell said on Monday: "We've made an early decision as there is no point delaying the inevitable. We now have standing water and it's pouring with rain.
"We've had 81 millimetres of rain since last Wednesday and that's a metre since April. Our next meeting is on December 11, so hopefully things improve between now and then."
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