If you’re expecting mail, it won’t be coming today.

Canada Post is suspending mail delivery due to poor air quality in Central and Southern British Columbia, caused by smoke from forest fires in the western United States.

“A Red service alert was issued today,” said a statement from Canada Post. “A Red service alert means that we are suspending delivery for the day and not sending our delivery agents out, as air quality conditions have made it unsafe.”

“The safety of our employees is our number one priority.”

Canada Post says mail delivery will resume once it is safe to do so, though there was no indication when that could happen. The smoky conditions are expected to persist in Kamloops until at least Thursday.

In addition to Kamloops, there will be no mail delivery in several other communities including Vancouver, Victoria, Kelowna, Vernon, and Penticton.