Cold Arctic air has taken hold again across the region with temperatures a dozen degrees below normal values for this time of year.
Sarnia's forecast high Monday was -8 C (18 F) when it's supposed to be around plus 4 C (39 F) in early March.
It will remain unseasonably cold through mid-week before gradually rising to a high of plus 2 C (36 F) Sunday.
Lambton Public Health has issued its fourth cold alert of the year with the temperature dropping to -16 C (3 F) tonight, and the wind making it feel like -24 C.
Residents should take precautions by dressing in layers, shielding exposed areas from the cold, and by limiting time spent outdoors.
Overexposure to cold temperatures can be hazardous and can lead to frostbite and hypothermia.
Local agencies that provide shelter and assistance to the homeless are advised to prepare for an increase in demand.
For more information about severe cold weather and the risks involved, click here.
