Nearly all of Manitoba is now under an air quality advisory as smoke from wildfires continues to move across the province, including the city of Winnipeg. That smoke is either causing or expected to cause very poor air quality and reduced visibility across all areas of Manitoba, except for a small area in its southeastern corner, Environment and Climate Change Canada said in an alert early Friday morning. Air quality and visibility due to wildfire smoke can fluctuate over short distances and vary considerably from hour to hour, the alert said. During those kinds of heavy smoke conditions, everyone is at risk regardless of their age or health, the weather agency said. The fine particles in wildfire smoke pose the main risk to people’s health.