On exterior walls, wet drywall is removed to a height of four feet but furring strips are left to dry in place. After this photo was taken, the beadboard insulation was also removed to aid drying.
HVAC ducts need to be drained and cleaned well. Where the window trim is left in place, note that a strip of drywall two inches wide is left to provide enough surface to tape and patch the joint.
Cutting out corner bead is tricky. An angle grinder with a thin cutoff wheel would be my tool of choice; second best would be an oscillating multi-tool fitted with a metal cutting blade. Third choice would be a reciprocating saw with a very fine tooth metal cutting blade.
Wet wood will have to be treated and dried thoroughly before new drywall can be applied to prevent the growth of mold.
Electrical wiring in conduit presents a special hazard as it can fill with water. This loop of conduit could be holding water just like a trap in a plumbing drain; it needs to be inspected and possibly re-done.
This receptacle seemed fine but blew up after a few minutes of use due to water in the electrical box, conduit, or the device itself.