While the most destructive fires are burning in Canada, wildfire smoke doesn’t respect national borders. Health officials warn that wildfire smoke contains fine particulate matter that can aggravate asthma, heart disease and other respiratory conditions. British Columbia Premier David Eby said homes and other structures had been lost and that some residents required rescue after conditions changed rapidly. The current emergency is part of a broader wildfire season that has affected multiple provinces, including British Columbia, Ontario and Quebec. Officials warn that challenging fire conditions could continue in parts of British Columbia as summer weather persists.