A heat warning is in effect for Greater Sudbury and vicinity.
A hot and humid airmass has reached the area and will remain in place through Thursday night, said the advisory issued by Environment Canada.
Maximum afternoon temperatures near 30 C are forecast today and Thursday with humidex values near 36 C.
Overnight minimum temperatures are likely to remain near 18 C, providing little relief from the heat.
A cold front Thursday night will bring cooler conditions and lower humidity for Friday.
Extreme heat affects everyone.
The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.
Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat.
