A home for sale "as is" often means repairs will be necessary. Don't write these properties off, the work may not be as bad as you expect, especially if you are the handy type. But approach them carefully, and get a thorough home inspection.
Identify possible damage, such as broken pipes and downed tree branches or power lines. Report damage to utility company and avoid the area to prevent personal injury. To repair roof damage, call or consult a licensed roofing contractor. Never try to thaw a frozen pipe with an open flame or torch. Shut off the water and call a licensed plumber. Carefully assess snow or ice accumulations around the home. Clear walkways and sidewalks to prevent injury, but use caution to avoid overexertion. Close exterior water spigots.