A yellow fog advisory is in effect for Waterloo region and Guelph Tuesday morning, with near-zero visibility reported in some areas, and people are being warned freezing rain is on the way on Wednesday.

Environment and Climate Change Canada says visibility may be suddenly reduced at times on Tuesday before improving later in the morning. Motorists are advised to turn on their full headlight system, slow down and maintain a safe following distance.

An orange weather warning has been issued for several areas including Waterloo region, Guelph, Stratford and Wellington County. Freezing rain is expected to begin overnight or early Wednesday morning and continue through much of the day before tapering off in the afternoon or evening.

Ice accretion of five to 10 mm is likely, with up to 15 mm possible. Easterly winds gusting up to 60 km/h combined with ice buildup could damage trees and lead to power outages.

Roads and walkways will likely become icy and slippery, which could significantly impact the morning and evening commutes.

There is also an increased risk of slips and falls.

People are encouraged to monitor the latest forecasts and alerts and to exercise caution if travelling.