Campgrounds will be full around Oregon this weekend, but campers will have to make do without fire.

The Oregon Parks and Recreation Department has announced a ban on campfires and open flames at all state parks, effective immediately. The ban is expected to last one week, and is a response to Gov. Kate Brown's recent statewide declaration of wildfire emergency.

The ban applies to "wood, charcoal, and other flame sources that cannot be turned off with a valve," the parks department said in a news release Thursday. Liquid fuel stoves that can be turned off with a valve will allowed, but cannot be left unattended.

Gov. Brown's declaration of emergency came Wednesday morning as the Substation fire erupted near The Dalles, which as of Thursday has burned 50,000 acres, killed one and forced residents to flee from their homes.

Last weekend, lightning strikes in southwest Oregon sparked around 100 small fires, including several near Crater Lake National Park. Meanwhile the Silver Creek fire has been burning in the forest near Silver Falls State Park.

On Thursday morning, Brown said this is already "a very difficult fire season," one that has hit the state nearly a month earlier than usual.

Parks officials expect the ban to only last a week, but will evaluate the length based on weather, conditions and input from state and local fire officials.

--Jamie Hale | jhale@oregonian.com | @HaleJamesB