The extreme heat poses significant risks for heat-related illnesses, particularly for those spending extended periods outdoors. Heat indices over 105 °F (40.5 °C) can lead to heat stress, especially in areas with high humidity. Outdoor events, including college football games in Norman and Tulsa, will see temperatures in the upper 90s to low 100s °F (36-38 °C), with heat indices potentially reaching 110 °F (43 °C). Those attending these events or engaging in outdoor activities should take precautions to avoid heat exhaustion or heatstroke.