Air quality is expected to reach the orange AQI category in southwest Minn., which is unhealthy for sensitive groups.
The Minnesota Pollution Control Agency (MPCA) has extended the air quality alert for southwest Minn. The alert now runs until 11 p.m. on Wednesday, Aug. 30. The affected area includes Marshall, Worthington, and the tribal nation of Upper Sioux.
Calm winds have allowed heavy ground-level smoke to linger over southwest Minn. this morning. Winds will remain light until the early afternoon, and fine particle levels may remain high throughout the day. Winds will become stronger from the southeast in the afternoon and air quality will improve across southwest Minn. on Wednesday afternoon. Fine particle levels should drop below alert levels by the end of the day.
Fine particle levels are expected to reach the orange air quality index (AQI) category, a level considered unhealthy for sensitive groups, across southwest Minn. In the orange area, sensitive groups should limit prolonged or heavy exertion and time spent outdoors.