1. Temporary Roof Repairs
Prioritize a temporary roof repair that lasts at least six months, allowing time for careful assessment and avoiding inflated repair costs. To weatherproof, drape large tarps over the roof ridge, securing them tightly at the edges. Use heavy-duty tarps from agricultural supply stores. For missing roof sheathing, patch with exterior-grade plywood of the same thickness.

2. Replacement for Missing Roof Material
If the outer roof material is absent, use 30- to 90-pound asphalt-impregnated roofing felt. Nail it along seams every 6 inches using felting nails. The 90-pound felt can last up to two years. When using 90-pound roll roofing with a mineral face, install it with the mineral side against the sheathing. Heavy felt is a suitable base for fiberglass shingle roofs, but remember to remove it for tin roofs.

3. Repair and Secure Gutters and Downspouts
Wire or secure loose or damaged gutters and downspouts to effectively redirect water away from the house.

4. Tree Removal for Safety
Before commencing repairs, remove trees from the house to ensure safety and accessibility.

5. Preserve Architectural Fragments
Keep and safeguard architectural fragments and building materials, even if they don't belong to your house. They could prove valuable for restoration efforts.

6. Address Water-Damaged Wood Floors
Treat water-exposed wood floors by washing them with fresh water. Absorb any saltwater using paper towels (avoid newspapers to prevent ink stains). Warping may occur as the floors dry, so avoid forced drying methods like heating or air conditioning. Patience is key, as it might take months for floors to be ready for refinishing.

7. Deal with Damp Insulation and Walls
Damp wall cavities, particularly if insulated, must be allowed to dry. Baseboards can be removed/reinstalled to access and remove damp batt insulation. In the presence of historic interior wall paneling, wainscoting, or decorative plaster, siding may need to be selectively removed to access wet insulation. Combat mold and mildew by scrubbing walls with a solution of water and mild detergent such as dishwashing soap. Avoid using harsh disinfectants like bleach. Avoid using fans in the presence of mold as they can exacerbate its spread. 

8. Manage Loose Plaster
Inspect for loose plaster and either secure it in place with screws or remove it. Save any decorative plaster pieces that have fallen for potential restoration.