Lambton Public Health (LPH) has a cold weather warning in effect, with Monday night's low temperature expected to drop to -15 C, with a wind chill of -23 C.
The warning from the medical officer of health will be in place until Tuesday.
This comes despite the ending of Environment Canada's extreme cold warning Monday morning.
The health unit is advising residents to take precautions by dressing in layers, shielding exposed areas from the wind such as head, neck, and face, and limiting time spent outdoors.
LPH said overexposure to cold can be hazardous and even life-threatening.
Hypothermia, which can strike in any season, occurs when the body’s temperature drops below the normal range between 36.1 C and 37.8 C (97 F and 100 F).
Symptoms may include pale skin, lethargy, confusion, excessive shivering, and hallucinations.
Local agencies that provide shelter and assistance to individuals experiencing homelessness are being told to prepare for an increase in demand.
A cold weather warning is issued when one or more of the following is met:
• Daily, low temperature is predicted to be -15 C or below, without a wind chill value.
• Environment Canada issues a wind chill warning for Lambton County.
• Extreme weather conditions, such as a blizzard or ice storm, are predicted.
For more information, and to access a list of available warming centres, visit LambtonPublicHealth.ca.
Those requiring assistance can call Lambton County Social Services at 519-344-2062, between 8:30 a.m. and 4:30 p.m., Monday to Friday.
For help outside of these hours, contact the Good Shepherd’s Lodge at 519-344-1679.