Oklahomans in the Oklahoma City Metropolitan area are bracing for a day marked not just by sunny skies and high temperatures, but by a concerning spike in ozone levels that has prompted an official Air Quality Alert, in a statement issued by the Oklahoma Department of Environmental Quality, the public has been notified of potentially hazardous ozone concentrations throughout the day, starting from 10 AM until 10 PM CDT this evening; this spike in ozone could particularly affect individuals with pre-existing heart or respiratory issues, who are advised to limit exertion and outdoor activity, according to the National Weather Service.