The combination of Pennsville's aging plumbing systems and its geographical features increases the risk of drain overflows and sewer backups during heavy rainfall. Homes with older clay sewer laterals are especially vulnerable to tree root intrusion, while grease and food waste buildup can lead to recurring clogs in kitchens. These issues can result in standing water, gurgling toilets, and multiple fixtures backing up simultaneously, which may require immediate professional intervention. Residents should be aware of these risks and take proactive measures to mitigate potential damage.