An air quality advisory for parts of the Fraser Valley, which included Langley, has been lifted.
Metro Vancouver had issued an air quality advisory earlier this week for central and eastern Fraser Valley because of elevated concentrations of fine particulate matter, due to smoke from wildfires in Washington State.
During an advisory, people with chronic underlying medical conditions are advised to avoid strenuous exercise.
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.
Smoke from wildfires in Washington state, now only four kilometres from the B.C. border, resulted in poor air quality and hazy sky on Monday. By Tuesday, winds had blown away much of the lingering smoke.
B.C. fire crews are expected to help out to fight the Stickpin fire in Washington.
Metro Vancouver works in co-operation with Environment Canada, the Fraser Valley Regional District and B.C. Ministry of Environment to look after air quality.