St. Louis County Sheriff Gordon Ramsay says the Minnesota Department of Natural Resources and the U.S. Forest Service expect Tuesday to be another "heavy fire day" with more "dangerous conditions."

Three major wildfires raging out of control in the same Minnesota county have burned more than 20,000 acres combined.

The Camp House Fire is nearly 12,000 acres; Jenkins Creek Fire is 6,800 acres; and Munger Shaw Fire is 1,400 acres. All are zero percent contained.

Due to their close proximity, fire officials have merged the Camp House and Jenkins Creek fires into one entity, now called the Brimson Complex Fire.

A new incident command team will take over the response to the two largest fires beginning Wednesday, state officials said.

Ramsay added: "A third large fire is burning currently on both sides of Munger Shaw Road south of Three Lakes Road moving quickly in a northern direction. Residents in the east half of Cotton Township including Morley Beach Rd, Elde Road and surrounding areas should evacuate."

Dozens of structures have been lost to wildfires in northern Minnesota, and cabin owners are wondering what they can do to protect their property.

Good Tuesday eveningThe heat and humidity continue across Minnesota today, with highs well into the 80s and another breezy afternoon. But big changes are coming—along with the most significant chance of rain and thunderstorms we’ve seen in a while.