A heat warning issued Wednesday for much of southern Ontario including Sarnia-Lambton continues Sunday.
Environment Canada reports the mid summer heat wave will continue with daytime temperatures once again reaching the low thirties on both days.
Afternoon humidex values will peak in the upper thirties to low forties.
Latest indications suggest a weak cold front will move through Sunday night or Monday morning.
In its wake, the weather will continue to be very warm, albeit somewhat less humid, with temperatures and humidex values settling down to just below the heat warning threshold.
The national weather agency issues heat warnings when very high temperatures or humidity are expected to pose an elevated risk of heat illness, such as heat stroke or heat exhaustion.
Environment Canada says symptoms of heat illness include:
- Dizziness or fainting, nausea or vomiting
- Headache
- Rapid breathing and heartbeat
- Extreme thirst
- Decreased urination with unusually dark yellow urine
Drink plenty of liquids especially water before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration.
Frequently visit neighbours, friends and older family members, especially those who are chronically ill, to make sure that they are cool and hydrated.
Never leave people or pets in your care inside a parked vehicle or in direct sunlight.
During heat warnings Lambton Public Health has cooling centres set up across the county. Click here for the list.
