Additional plumes of smoke from Canada's active wildfires prompt officials to issue a statewide air quality alert on July 14.

The extended forecast suggests unsettled weather midweek, with rain probabilities ranging from 30% to 60%. There is some uncertainty about the exact timing and placement of the rain, but meteorologists anticipate widespread cloud cover and precipitation potential Wednesday through Thursday.

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.