A flood detector is a smart device that can help prevent water damage to homes and buildings. These devices use sensors to detect water leaks and alert the homeowner or building manager of any potential problem. The market offers a range of options for flood detectors, with some offering additional capabilities such as temperature and humidity readings. These devices activate only if water touches them, and should be placed in areas where leaking water would pool. It is recommended to opt for a device with an alarm sound that is at least 80 decibels loud and has a stable connection to Wi-Fi to ensure alerts are received. Some devices may rely on a hub and can be linked with other devices for extra features such as voice alerts from smart speakers or the ability to trigger a light bulb. While flood detectors cannot entirely prevent floods, they can help reduce the risk of severe damage by alerting homeowners or building managers to any problems quickly.