SpaceGuard is an integrated cloud platform designed to protect communities and vital infrastructure from severe water-related threats—including flash floods, urban inundation, river overflows, and sudden water contamination. By synthesizing high-resolution synthetic aperture radar (SAR) and multispectral satellite data with local IoT hydrological sensors, SpaceGuard provides emergency responders, civil defense units, and municipal water authorities with predictive flood inundation mapping and automated contamination alerts.