Disaster Risk Reduction Efforts (PRB) continue to be built and addressed through various activities considering that Indonesia is a country that is prone to disasters. In the era of the Industrial Revolution 4.0, with an abundance of information The educational community as one of the important stakeholders Risk Reduction Efforts (PRB) were required to be critical of the information that was spread out including disaster information. However, students do not aware with the abundance of information available that is appropriate for the basis of disaster preparedness. Therefore the writing of this article aims to measure the level of critical thinking and its contribution to disaster preparedness, especially flooding, in geography education students. The research method chosen in this study is the Quantitative Survey. The results showed that the level of critical thinking and disaster preparedness of students included in the medium category. The results of the contribution of critical thinking to disaster preparedness showed the result of R square (R2) determination of 50.4%. This shows that critical thinking has an influence on student disaster preparedness. Therefore, it is time to think critically about information to be the focus in one of the efforts in disaster preparedness activities.