。
The house was blown away by the storm.
Literal
Violent-wind [by-で] house [subject-が] was-blown-away.
飛ばされた layers two derivations: the causative stem 飛ばす ('cause to fly, blow away') from 飛ぶ ('to fly'), then the passive ~される on top. Fly → cause to fly → be caused to fly. This kind of stacked morphology is typical of Japanese verbs describing natural forces acting on objects. The で here marks 暴風 as the cause/agent — 'by the storm.'