ST. PAUL, Minn. — An air quality alert has been extended through Monday by the Minnesota Pollution Control Agency as western Canadian wildfire continue sending fine smoke particles airborne across the border. Affected also are neighboring Iowa, Wisconsin and contiguous areas.

We’re not alone. Major wildfires in the Grand Canyon and Maui have degenerated air quality even more severely. Images: National Weather Service

Hawaii. Heavy smoke at Maui and the Big Island.

What to do

> If smoke-sensitive, limit your time outside. Avoid prolonged or heavy exertion. Keep windows closed, even overnight.

> Avoid outdoor burning and residential wood-burning devices.

> Reduce vehicle trips. In a motor vehicle, idle as little as possible.

> If you use an inhaler, keep it handy.