It's been scorching hot for both players and fans out in Edmond at the U.S. Senior Open.
Unfortunately, at least one player has dropped out of the Open after suffering from a heat related illness.
NewsChannel 4's Meg Alexander says that the golfer is expected to be okay, but unfortunately it just showcases how important it is to stay cool.
"We're expecting within the next couple days the heat will be going up and hopefully people will continue to stay hydrated and take breaks to help Prevent them from having any heat problems."
60-year-old Darrell Kestner from New York has dropped out after suffering heat exhaustion.
Officials say he is expected to fully recover.