Drivers face 120-degree cockpit temperatures and often lose 5 to 10 pounds of...

https://www.acid-bookmarks.win/dealing-with-120-degree-cockpits-and-10-pound-sweat-loss-takes-a-toll-on-any

Drivers face 120-degree cockpit temperatures and often lose 5 to 10 pounds of sweat during a single race. It takes a heavy toll on the body