A flooded basement occurs when water accumulates in the lowest part of a building, often due to heavy rain, melting snow, or plumbing failures. This can lead to significant damage to the structure, personal belongings, and electrical systems. Common causes include poor drainage, blocked gutters, and foundation cracks. To address a flooded basement, it is essential to remove the water quickly to prevent mold growth and further damage. Using a sump pump or wet vacuum can help. Additionally, homeowners should consider waterproofing solutions and regular maintenance of drainage systems to reduce the risk of future flooding.