PHILADELPHIA -- People aren't the only thing traveling cross country for the holiday. Smoke from the Camp Fire has reached the East Coast.
Particles from the California wildfire smoke have billowed out some 3,000 miles east following the jet stream.
RELATED: Check current Bay Area air quality levels
This is smoke about a mile up in the atmosphere that creates gray haze high in the sky and can produce spectacular sunsets.
This smoke is so high in the sky it, fortunately, doesn't cause any health problems.
If the particles were forced to the surface, they could cause respiratory problems for people with heart and lung and issues.
See more stories, photos and videos on the Camp Fire in Butte County here.
California wildfires to blame for haze over Philadelphia