The Ptarmigan fire, burning near Silverthorne, continued to grow Tuesday, with no containment reached as firefighters protected nearby neighborhoods.
Currently the blaze is between 85 and 100 acres, said Dillion District Ranger Adam Bianchi during an evening press conference. Firefighters do not have a precise number due to aerial support being downed at 1 p.m. because of the weather.
As weather conditions changed on Tuesday, fire officials ordered evacuation and pre-evacuation orders that impact 537 homes, said Summit County Sheriff Jamie FitzSimons.