Smoke from the wildfires in Alberta, Canada, was affecting parts of Washington, Oregon, Montana, North Dakota, Missouri, Minnesota, Iowa, South Dakota, and most of the states east of the Mississippi River Saturday – plus the Canadian provinces of Alberta, Saskatchewan, and Manitoba.

Montana is particularly affected according to AirNow, with Helena having “Unhealthy” air quality Friday morning. Lewiston and Great Falls are rated at “Unhealthy for Sensitive Groups.”

But it is much worse in the Canadian provinces of Alberta, Saskatchewan, and Manitoba. For example, the air quality in Calgary is maxed out on the nasty air scale, rated at “Very High Risk.”