Excerpts from fox32chicago.com:

A firefighter was injured  during a fire at an RV service center in near north suburban Antioch.

The Antioch Fire Department responded to a structure fire at the Gander RV Service Center of Antioch at the intersection of Route 45 and Route 173 around 7:30 p.m. Saturday evening. Crews faced heavy flames and some explosions from a garage inside the structure. A firefighter was injured during the blaze, but was treated and released without requiring transport to an area hospital.

Firefighters from at least nine neighboring departments and fire districts responded to the blaze which was struck out about two hours later.

Fire officials said the exact monetary loss is unknown, but is expected to reach into the millions of dollars due to the building, RVs, and contents destroyed in the blaze.