from the Plymouth Speedway website:

"The rain is coming down in buckets and we have lost the track. Unfortunately, we have to postpone tonight's racing action until next week. Keep receipts, tickets and wristbands and they will be honored next week."

Sprint Heats:
Heat 1: Gurley, Ligouri, Burkin, Moore, Gross.

Heat 2: Cottle, Hanft, Bares, Pobanz, Davies

Seen pics. Pit roads were streams.

Looked like one big rain band from west to east hit the track