Lone Star Park near Dallas has canceled its Sunday card on an afternoon of severe heat in North Texas.
The track announced it made the call in consultation with the local riding colony.
In the past, the Texas heat has forced the cancellation of a handful of days of racing at Lone Star.
Forecasters have been warning of extreme heat in the region this weekend, with the high for the area on Sunday projected to be 104 degrees.
Lone Star races some nights, but has day posts on Saturdays and Sundays.
Racing is scheduled to resume Thursday night.