The African dust approaching the United States this week raises many questions. A meteorologist explains what you need to know about its effects, risks and benefits.

Meteorologist Chita Craft breaks down how Saharan dust can affect air quality and its potential health impacts.

Dust isn't the only threat out there, especially for those with respiratory problems. Smoke from Canadian wildfires is moving south into the U.S., although it is not expected to last as long or be as bad in Florida as it was almost two years ago.