Toxic wildfire smoke chokes major US cities: Latest

Philadelphia issued a “Code Purple Air Quality Emergency Day” on Friday as very unhealthy air from the hundreds of Canadian wildfires travels down.

​Philadelphia issued a “Code Purple Air Quality Emergency Day” on Friday as very unhealthy air from the hundreds of Canadian wildfires travels down.  US Philadelphia issued a “Code Purple Air Quality Emergency Day” on Friday as very unhealthy air from the hundreds of Canadian wildfires travels down.