As a day progresses the air near the water’s surface can warm some and the inversion erodes. The smoke will lift and disappear into a larger space in the air over Michigan. So the strong visual of thick smoke turns into a faint haze of smoke all over the sky of Michigan.

As hundreds of wildfires burn across Canada, smoke is traveling south and potentially affecting Americans’ health. Here's why it can be so dangerous.

The U.S. Environmental Protection Agency warns that wildfire smoke contains dangerous pollutants in the form of fine particles known as PM 2.5 that can penetrate deep into the lungs and enter the bloodstream. Short-term exposure can lead to bronchitis, worsen asthma and create other health issues.