The Kalamazoo Department of Public Safety said a maintenance worker reported seeing smoke and flames coming from a building at Village Apartments at about 12:50 a.m. Officers found heavy smoke and flames engulfing part of the building, and they used ladders to rescue a number of residents from balconies.
The department didn't release the victim's name. Family members said she was a woman in her 60s and her boyfriend was injured in the fire.
The American Red Cross is helping displaced residents.
Authorities said they haven't determined what caused the fire.