![dfw precipitation totals dfw precipitation totals](https://npr.brightspotcdn.com/dims4/default/5a2b660/2147483647/strip/true/crop/960x504+0+85/resize/1200x630!/quality/90/?url=http:%2F%2Fnpr-brightspot.s3.amazonaws.com%2Flegacy%2Fsites%2Fkera%2Ffiles%2F201402%2F1795670_639120246124592_1206739718_n.jpg)
On the basis of these radars, CASA has developed an end-to-end warning system that includes sensors, software architecture, products, data dissemination and visualization, and user decision-making modules.
![dfw precipitation totals dfw precipitation totals](https://www.iweathernet.com/wxnetcms/wp-content/uploads/2015/10/north-texas-rain-totals.png)
The center for the Collaborative Adaptive Sensing of the Atmosphere (CASA) Dallas–Fort Worth (DFW) Urban Demonstration Network consists of a high-resolution X-band radar network and a National Weather Service S-band radar system (i.e., KFWS radar).
![dfw precipitation totals dfw precipitation totals](https://images.foxtv.com/static.fox4news.com/www.fox4news.com/content/uploads/2020/10/868/488/CEE82439526B4030B1B0B5019CFDABF0.jpg)
Finally, the current research status is summarized, and the orientation of future research is also discussed. Then, the application of remote sensing and GIS technologies to flash flood disasters is analyzed in terms of aspects such as flash flood forecasting, flash flood disaster impact assessments, flash flood susceptibility analyses, flash flood risk assessments, and the identification of flash flood disaster risk areas. First, a visualization analysis of the literature is performed, including a keyword co-occurrence analysis, time zone chart analysis, keyword burst analysis, and literature co-citation analysis. In this paper, more than 200 articles published in the last 20 years are summarized and analyzed. The application of remote sensing and geographic information system (GIS) technologies in the study of flash floods has increased significantly over the last 20 years. As climate change and urbanization advance, an increasing number of people are at risk of flash floods. Flash floods are among the most dangerous natural disasters.