Disaster risk reduction (DRR) has long been known in the literature for mitigating the impacts of natural hazards on environmental, social and economic. Remote sensing technology is one method for achieving the DRR by spatial and temporal analysis. This research applying the remote sensing technology to observe the hazard area as a quick response DRR to achieve the environmental sustainability. The study area is in Semarang City, which has some environmental issues such as flood, land subsidence and sea level rise. A new method of remote sensing, namely, Differential synthetic aperture radar interferometry (D-InSAR) was applied to generate the subsidence area, a flood data from BNPB was used for mapping the flood distribution, and the field survey was conducted to observe the government and community adaptation response. By analyzing those data, the distribution of flood and land subsidence were generated. It can be used for forecasting on the early warning system as the goal of DRR.