India, Nov. 17 -- Canadian Wildfires are impacting the northern US, with smoke drifting into parts of Nebraska, South Dakota, and Minnesota, and prompting officials to urge residents to stay indoors, as reported by Newsweek. Air quality levels, which began in the "Moderate" range, have deteriorated to "Unhealthy" in some areas.

AirNow, the air-monitoring platform operated by the US Environmental Protection Agency, tracks pollution levels using the Air Quality Index (AQI), which ranks conditions from "Good" to the most severe category, "Hazardous."

According to the latest readings, portions of South Dakota, including wide stretches of Badlands National Park, have now reached the "Unhealthy" range, with an AQI of 167. This level falls wit...