An unhealthy air quality alert is in effect for residents of Pittsburg and McIntosh counties in Oklahoma due to elevated levels of fine particulate matter, known as PM2.5, as reported by the Environmental Protection Agency (EPA). These tiny pollutants, originating from sources like vehicle emissions, industrial activities, and wildfires, pose significant health risks, particularly to individuals with pre-existing respiratory or cardiovascular conditions, children, and the elderly. As of February 26, 2026, at 2:30 a.m. ET, the AirNow map indicated that the pollution levels had reached the 'unhealthy' category, prompting recommendations for residents to take immediate precautionary measures.