The first order of business in assessing water damage to the electrical equipment in any industrial plant is to gather all pertinent drawings and documentation available and perform a walkthrough of the entire electrical infrastructure. However, at times, drawings and documentation may not be available due to destruction (Photo 1). In this case, walkthroughs must be performed through tribal knowledge of plant personnel. Keep in mind the initial assessment is preliminary in nature, and an absolute understanding of the damage will not be gained until the equipment is disassembled in its entirety.

Inspect damaged materials for mold and mildew. Mold can start to grow in the right conditions in as little as 24 hours. For long-term issues, like mold caused by attic condensation, the mold may have started growing a long time ago. And if you find mold and mildew issues, you need to be very careful. Some mold is toxic to humans, and all mold is very damaging to the materials it infests. For small mold issues, cut out the material, bag it, and throw it away immediately. For serious mold issues, get out of the area, shut down any airflow (to avoid spore contamination) and call a professional. And keep in mind that mold can show up in hidden areas like inside walls or under floors, so this inspection and water damage repair will be ongoing.
All severely warped wood (particularly flooring), rotting wood and wood that has developed mold/mildew problems will need to be replaced. Pry apart damaged boards and thoroughly clean beneath them before replacing them. And if the wood is a structural component of your house, you must be very careful when replacing it so that the structure has the right support during and after the water damage repair project.
An insurance policy may or may not cover the costs associated with water damage and the process of water damage restoration. While a common cause of residential water damage is often the failure of a sump pump, many homeowner's insurance policies do not cover the associated costs without an addendum which adds to the monthly premium of the policy. Often the verbiage of this addendum is similar to "Sewer and Drain Coverage".
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