Edmontonians saw a slight improvement in the smoky skies Sunday.

The air quality index in the city had dropped from a 10 – very high risk – to a high-risk 9 by Sunday afternoon.

According to Environment Canada, wildfire smoke is harmful even at low concentrations, and residents in affected areas were told to reduce or reschedule strenuous outdoor activities and watch for symptoms such as coughing and throat irritation.

Older people and young children are at greater risk from side effects of the smoke, as well as people with lung or heart conditions. Those with increased risk should avoid any outdoor physical exertion while levels are high.

The City of Edmonton activated its extreme weather response for poor air quality Sunday. City facilities, like recreation centres and libraries, will be open for anyone needing a break from the smoke.

Social agency partners will also be handing out N95 masks to community members in need of protection.