Lambton's medical officer of health has issued a cold weather alert for the region.
The alert will be in effect overnight Thursday and into Friday.
Cold weather alerts are issued by the health unit when temperatures are expected to drop below -15 C, or when windchill values are expected to be -20 C or lower.
Lambton Public Health (LPH) advises local agencies that provide shelter and assistance to individuals experiencing homelessness to prepare for an increase in demand.
The health unit said residents should take precautions by dressing in layers, shielding exposed areas from the wind such as head, neck, and face, and limiting time spent outdoors.
For details visit www.lambtonpublichealth.ca or call 519-383-8331.