An air quality advisory has been issued for Vanderhoof, Smithers, Telkwa, Houston and Burns Lake because of high concentrations of fine particulates which are expected to persist for the next few days.
For the next three days, no new fires may be initiated and no additional material may be added to existing fires, the Ministry of Environment said in an alert issued shortly after 2 p.m. Thursday.
The advisory was issued in collaboration with Northern Health.
"Persons with chronic underlying medical conditions should postpone strenuous exercise until the advisory is lifted," officials advised. "Staying indoors and in air conditioned spaces helps to reduce fine particulate exposure.
"Exposure is particularly a concern for infants, the elderly and those who have diabetes, and lung or heart disease."