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Reducing Vehicle Submersion Damage Caused by Flooding in Depressions and Underpasses
-Launch of a Demonstration Test for the “Vehicle Submersion Emergency Alert” System

  • Social
  • Climate Change
  • R＆D

Toshiba Digital Solutions Corporation

In April 2025, Toshiba Digital Solutions Corporation and Mitsui Sumitomo Insurance Co., Ltd. began a demonstration test of the “Vehicle Submersion Emergency Alert” system in four prefectures—Saitama, Chiba, Shizuoka, and Aichi—to help minimize damage from vehicle flooding. 
In recent years, vehicle damage caused by natural disasters has been increasing, not only from frequent hailstorms but also from flooding in low-lying areas and underpasses. To prevent vehicle flooding, it is essential to identify high-risk areas through real-time rainfall analysis that takes into account the terrain and other factors. However, sudden and localized heavy downpours—known in Japan as “guerrilla” rainstorms—are difficult to predict in advance. 
In response, Toshiba Group will leverage data analysis technology developed through its weather radar system business to deliver alerts aimed at mitigating vehicle flooding damage. In this demonstration, SMS alerts will be sent to target recipients based on rainfall prediction data approximately 30 minutes in advance, notifying them of the risk of vehicle flooding, and the preventive effects will be assessed. 
Through this initiative, both companies aim to encourage behavioral changes that help customers avoid vehicle flooding damage and to expand the range of solutions that contribute to disaster prevention and mitigation, utilizing insights obtained from the experiment.