A fog advisory that was issued for parts of southern Alberta on Sunday has since been lifted.
Environment Canada issued the statement at 8:30 a.m. Sunday for Calgary, Airdrie, Cochrane, Olds, Sundre, Brooks, Strathmore, Vulcan, Drumheller, Three Hills, Okotoks, High River and Claresholm.
Advisories ended for Brooks, Strathmore, Vulcan, Drumheller and Three Hills at around 2:30 p.m.
By early Monday morning, all advisories had been lifted for Alberta.
Fog advisories result when near-zero visibilities are apparent.
“Travel is expected to be hazardous due to reduced visibility,” the agency said.
Regions with below-freezing temperatures may experience patchy freezing drizzle until the fog dissipates, Environment Canada said.
Areas of dense fog persisted until Sunday afternoon.
On Saturday, mist sank into Calgary at around 4 p.m. and remained for the rest of the evening.
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The Air Quality Health Index was at the high-risk level — seven around 7 p.m. to 8 p.m., according to Environment Canada. That number gradually went down to two early Sunday morning.
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