The Chiefs want to make sure their fans stay cool Sunday at Arrowhead Stadium. With temperatures projected to climb into the upper 90s on Sunday afternoon, the Chiefs will place mist machines at several locations in the stadium. All concessions stands will have bottled water for sale, and the Chiefs will allow fans to bring in sealed plastic water bottles no bigger than 20 ounces. The Chiefs are also reminding fans that they’ve changed their pass-out policy this season. No one will be allowed to leave Arrowhead Stadium and re-enter.