This afternoon's meeting at Taunton is subject to a 10am precautionary inspection.
Overnight temperatures dropped to well below freezing, and parts of the track are not thawing as quickly as had been anticipated.
A statement issued by Taunton on Facebook read: "As frustrating as this is, we are now having a precautionary inspection at 10am.
"There was a minus 2C frost overnight and temperatures have been slow to rise this morning.
"The latest information is showing plus 1C/2C by 10am and plus 4C by noon. We will keep you posted."