Yes, exposure to mold is not healthy for anyone inside buildings.
Water is the key.
When water is left to sit for 24 hours, common mold can take hold. When molds grow they produce spores. Mold spores are extremely small and can stay in the air almost indefinitely. Some common molds are Alternaria, Aspergillus, Botryis, Mucor and Penicilluim. If common mold problems are left unattended a more lethal mold can develop.