Heavy flames pour out of an eight-unit building at the Fawn Ridge Apartments in the 1900 block of North Orleans Street in McHenry early Tuesday morning. | Photo: Susie Morjal

A firefighter and two residents were injured during an extra-alarm fire that extensively damaged an apartment building and displaced residents in McHenry Tuesday morning.

The McHenry Township Fire Protection District responded around 3:40 a.m. Tuesday to the Fawn Ridge Apartments in the 1900 block of North Orleans Street in McHenry for a report of an apartment building fire.

McHenry Township Fire Protection District Battalion Chief David Harwood said crews arrived in four minutes to find heavy flames showing from the rear of a two-story building.

The fire was extending into the attic space from the second floor of the eight-unit building.

The Mutual Aid Box Alarm System (MABAS) was activated to the second alarm level to bring additional fire departments to the scene.

Firefighters work to extinguish a second-alarm fire at an eight-unit building at the Fawn Ridge Apartments in the 1900 block of North Orleans Street in McHenry early Tuesday morning. | Photo: Joe Shuman/J. Shuman Photography (2023)

Fire crews began an offensive attack on the inside of the building while searches were being conducted for any occupants still inside, Harwood said.

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A defensive attack, from the outside, was performed on the fire once it was confirmed all residents had escaped.

Harwood said the building sustained extensive fire, smoke and water damage. It was deemed uninhabitable.

The American Red Cross was called to the scene to assist displaced residents.

Firefighters work to extinguish a second-alarm fire at an eight-unit building at the Fawn Ridge Apartments in the 1900 block of North Orleans Street in McHenry early Tuesday morning. | Photo: Joe Shuman/J. Shuman Photography (2023)

One resident was transported to the hospital in good condition. A second resident was evaluated by paramedics but declined transport to the hospital.

A firefighter suffered minor injuries that did not require hospitalization, Harwood said.

The Crystal Lake, Nunda, Wauconda, Richmond, Fox River Grove, Algonquin, Fox Lake, Wonder Lake, Spring Grove, Cary, Woodstock, Lake Villa and Round Lake fire departments assisted.

McHenry Township Fire Protection District investigators are investigating the cause of the fire. A damage estimate was not immediately available.