Early problems at Huntingdon
Huntingdon's meeting on Friday is already in doubt with an inspection called for 11am on Wednesday as the course is partially flooded.
Having lost its last meeting to a similar problem, the brook which runs adjacent to the course has broken its banks once more.
Nearly 10mm of rain fell on Saturday and river levels are still rising with more rain forecast.
Clerk of the course Sulekha Varma tweeted: "Huntingdon: Flooded last night. Water still rising. Inspection 11am Wed. All not lost but need water to start receding soon!"