Two right northbound lanes and the off-ramp to the Seatac rest area have been closed as officials investigate.
The suspect remains at large and is described as wearing a red hoodie, light-colored pants, and light shoes.
The teenager, in serious condition, is being treated at Harborview Medical Center, according to spokesperson Susan Gregg.
Please use the Firth-Sterling outbound lanes until further notice.
Police ask public to please stay out of the area.
Her Godfather said: “She loved Mickey Mouse and she loved the doll babies”
1-year-old Roman Huizar is safe.
An AMBER Alert has been issued for a 1-year-old Roman Huizar, believed to have been taken by a suspect in an earlier shooting.
Investigators warn that Huizar is considered armed and dangerous, with the potential to commit further offenses.
Multiple spot fires have erupted as embers were carried by the wind.