Windsor and Chatham-Kent residents won't be getting any mail the rest of the day Wednesday.
Canada Post has issued a red service alert for Windsor and Chatham due to poor air quality. When a red alert is issued all deliveries are suspended and mail courriers are recalled.
"The health and safety of our employees is our top priority. Severe weather, floods, wildfires and poor air quality can pose safety risks. Customers may notice that we do not send out our employees - or we pull them off the street - if conditions become unsafe," said Lisa Liu, from Canada Post media relations in a media release.
Delivery will resume when air quality conditions improve.
All letters and parcels will be held in a secure location until delivery services start up again.