Maps show the air quality of the USA and the forecast of Forest Fire of Canada

A air quality map shows conditions in the United States as Canadian forest fire The smoke moves through parts of the country, which causes alerts and notices of air quality in multiple states this week.

The map shows that parts of Illinois, Indiana and Michigan faced an unhealthy air from Thursday afternoon, according to a federal measurement system called Air quality index. Minnesota And Wisconsin had experienced unhealthy air on Wednesday and previous days.

The air index has six grades:

• Good
• Moderate
• Unhealthy for sensitive groups
• Unhealthy
• Very unhealthy
• Dangerous

Sensitive groups include those that have heart or pulmonary disease, as well as older adults, pregnant children and women.

Air quality warnings or alerts were issued for several states throughout the week, including Minnesota, Wisconsin, Michigan and Illinois, as well as in New York, Massachusetts, Connecticut and parts of Maryland, according to the National Meteorological Service.

Here is a look where the alerts will be in force until Thursday.

The smoke of forest fires could be visible in other areas, but it may not affect air quality.

Smoke is expected to have less effect in the next few days. These maps show where the smoke will move until Friday morning.

According to the Canadian interagential forest center, more than 200 fires are considered in Canada, with more than 100 of them out of control. Tens of thousands of residents in three provinces have been evacuated due to the flames.

Nikki Nolan contributed to this report.

• Air quality
• Forest fire
• Forest fire smoke
• Canada