A fire tore through an apartment building in Somerville early Monday and one woman escaped by jumping out of a window and onto a mattress.

Crews responded to reports of a fire in an elderly woman’s apartment at Bradford Condominiums in Woburn, Massachusetts early Friday morning, the local fire department said. The resident was bedridden, and witnesses could hear her calling for help as smoke filled the second-floor apartment, local outlet Boston 25 News reports.