LiDAR enhances digital twin construction for heritage sites, improving disaster warning systems by providing high-precision 3D models. It captures detailed structural data, enabling accurate monitoring of site conditions. Real-time analysis detects subtle changes, like cracks or erosion, predicting risks from earthquakes, floods, or landslides. Integrated with IoT and AI, LiDAR-driven digital twins enable proactive alerts, faster response times, and precise damage assessments, enhancing heritage preservation and safety.