Here is a link to a few ideas from the EPA about mold and moisture control after floods:

6/1/2018 (Permalink)

https://www.epa.gov/natural-disasters/flooding

Mold

• Mold cleanup: Mold can cause serious health problems. The key to mold control is moisture control. After the flood, remove standing water and dry indoor areas. Remove and discard anything that has been wet for more than 24-48 hours.
• Mold cleanup in schools and commercial buildings. Information for building managers, custodians, and others who are responsible for commercial building and school maintenance.
• Basic mold hazards. Cleaning up mold. What to wear
• More about mold from Centers for Disease Control

During a flood cleanup, the indoor air quality in your home or office may appear to be the least of your problems. However, failure to remove contaminated materials and to reduce moisture and humidity can present serious long-term health risks. Standing water and wet materials are a breeding ground for microorganisms, such as viruses, bacteria, and mold. They can cause disease, trigger allergic reactions, and continue to damage materials long after the flood.