Deadly wildfire smoke spreads across much of northeast US
Toxic smoke from raging fires in Canada continued to impact large swaths of eastern North America Thursday. Overnight and into the morning, air quality deteriorated to record-shattering levels. In Lancaster, Pennsylvania, the hourly Air Quality Index peaked at 491 Thursday, far surpassing the threshold of 300 considered “hazardous.” In Philadelphia, monitors topped out at 425 overnight, while in the Washington[Read More…]