The ongoing Canada wildfires are affecting central and parts of southern Indiana, causing significant smoke dispersion in the region. The National Weather Service has issued a special statement warning of reduced visibility ranging between 3 and 4 miles, with peak reductions of up to 1 mile possible. Air quality may become unhealthy for sensitive groups. Travelers passing through the affected areas should be prepared for sudden reductions in visibility due to haze. Conditions are expected to improve by Thursday, according to officials.