Tillsonburg is under a wind chill warning.
Environment Canada says cold brisk winds are also expected to produce widespread dangerous wind chills of minus 30 to minus 35 beginning late today. Wind chills can reach minus 35 to minus 40 overnight tonight and Tuesday morning.
Environment Canada urges extreme caution is advised for people heading outdoors. Exposed skin may freeze in less than 5 minutes.
It is also suggested to help prevent freezing of pipes in buildings, one could turn on the lowest tap in the house and let it run as a pencil-thin stream or fast drip while keeping indoor temperatures a little warmer at night.
Wind chills will improve slowly on Tuesday.