they would have to go slower of course. But they get over 200MPH in F1 at Monza, they race there in the rain on wet weather tires.
red flag now.
It takes a minimum of 90 minutes to dry it out, if the wind comes up, 120-150 if it doesn't (although the wind seems like a sure thing).
That puts the timeline of a restart back to about 3:30 or so, hopefully leaving enough daylight. Drop dead restart time would be 4pm IMHO.
Do Buffaloes have wings?