Rochester, St. Cloud and the Twin Cities were under an air pollution advisory Thursday.
The Minnesota Pollution Control Agency issued the advisory for fine particulates, or soot, some of which is blowing into Minnesota from southern states.
The air quality index, a measure of how bad the air is, was between 79 and 86 on Wednesday. When it reaches above the 100 level, the air is considered unhealthy for sensitive groups such as people with heart or lung disease, people over 50 years of age and children involved in heavy exercise.
The MPCA recommended Minnesotans to limit their driving, avoid mowing lawns and postpone any painting.
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