The Oklahoma State Department of Health  reminds residents that heat-related illness can range from heat cramps and heat exhaustion to hyperthermia (overheating) and heat stroke. Heat stroke occurs when the body is unable to cool itself sufficiently, and it often results in severe organ damage or even death. 

Dress appropriately. Wear lightweight, light-colored, loose-fitting clothing as well as sunscreen with SPF 15 or higher and broad spectrum or UVA/UVB protection.