The science behind the Prairies' Twilight Zone "hail fog"
Temperatures reaching 29 degrees Celsius combined with overnight lows near 14 degrees Celsius are expected for the next 3 days.
The extreme heat is forecast to end on Tuesday night, with the exception of Calgary, which will end tonight.
Heat warnings are issued when very high temperature conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.
For more heat health advice, visit: www.albertahealthservices.ca/news/heat.aspx.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ABstorm@canada.ca or tweet reports using #ABStorm.