Wildfire smoke in Lower Mainland this summer 'unprecedented'

This summer’s episodes of wildfire smoke drifting from the B.C. Interior into the Lower Mainland were “unprecedented” in their duration and the geographic area they affected, according to a Metro Vancouver staff report.
The report, which senior project engineer Francis Ries prepared for the climate action committee, noted that the regional district issued five air-quality advisories during the summer of 2017, resulting in advisories being in effect for a record 19 days.
Metro V