Sandbags are commonly used in flood situations to create temporary barriers, providing mass to slow water ingress. While sand itself is permeable, the effectiveness of sandbags increases when combined with impermeable materials like plastic sheets, which help prevent water from passing through. Without such barriers, sandbags only delay flooding, necessitating additional measures like pumps to manage water accumulation. In flood-prone areas, it is crucial to shut off sewer connections to prevent sewage backflow, which can exacerbate flooding issues. This can be done by plugging sewer lines, often requiring access to cleanouts or disconnecting drain lines from sinks and toilets. The discussion highlights the inadequacies of residential plumbing designs compared to commercial systems, which typically allow for better access and management during emergencies. Recent flooding events in the UK have led to significant displacement and financial losses, emphasizing the importance of effective flood management strategies.