State and fire officials on Wednesday expanded the area around Colorado Springs that needs to be evacuated because of the Waldo Canyon blaze, and pre-evacuation orders were issued for a separate fire near Boulder.

More than 1,000 people were fighting the Waldo Canyon blaze -- the state's most-threatening fire though not its largest -- and firefighters were bracing for a changing weather pattern that could hinder their efforts. The blaze abruptly doubled in size overnight and has already forced more than 32,000 residents to flee their homes.