This is from Eric Haak:

At 14:32, the first response was recorded, followed by a still and box alarm at 14:34. A 2-11 was called at 14:43. Fire companies were fully involved in the back porches of a 2.5-story frame structure that had spread to exposures on both sides and the alley garage. The side D exposure was a 2.5-story ordinary building, while the side B exposure was a 1.5-story ordinary. Side D also featured a frame back porch addition. A mayday was called when a company became trapped due to rapidly advancing fire conditions, which escalated the alarm to a 3-11. Later, a second mayday occurred, and two firefighters were transported in yellow condition. Engine 28 was operating in sector A, Engine 39 was stationed at the entrance of the alley on Loomis Street, Engine 29 was at the corner of Lyman and Ma Benton Lane, and Engine 8 was on Bonfield Street. Tower Ladder 5 was set up but never used. Squad 1A was deployed to sector A and worked on the attic.
Chicago fire truck at house fire with smoke

Eric Haak photo

firemen on ladders with smoke

Eric Haak photo

firemen in an alley fighting a building. Chicago fire truck at fire scene

Eric Haak photo

firemen cutting garage door at fire scene

Eric Haak photo

Chicago FD Snorkel at fire scene

Eric Haak photo

Chicago fire truck at fire scene

Eric Haak photo

Chicago fire truck at fire scene

Eric Haak photo

Chicago FD Engine 39

Eric Haak photo

More images from Dennis McGuire, Jr.

Chicago FD engine at fire scene

Dennis McGuire, Jr. photo

firemen at fire scene

Dennis McGuire, Jr. photo

firemen and police officers at fire scene

Dennis McGuire, Jr. photo

alley garages after a fire

Dennis McGuire, Jr. photo

You can view more photos at http://312firephotos.smugmug.com/Chicago-Fire-Department-Fires/2014/311-mayday2-2989-S-Lyman-10122.

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