Flames started shooting from the home on the unit block of Belmont Drive after 10 p.m. Monday.
Arriving firefighters were able to rescue the victim as smoke filled the 2-story home.
Raw Video: Garage fire in Delaware
Medics rushed him to Christiana Hospital, and he was later transferred to Crozer-Chester Medical Center in critical condition.
The Delaware State Fire Marshal has determined the blaze was caused by some kind of malfunction in the engine of a vehicle that was parked in the garage.
Man, 87 critical after Del. garage fire
The fire caused more than $100,000 in damage.
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