Flood sensing device, flood sensing system, and non-transitory computer readable medium

A non-transitory computer readable medium storing a flood sensing program executed by a computer to perform a process comprising:

• acquiring a plurality of types of traveling state data relating to traveling of a vehicle;
• and
• sensing flooding of a road on which the vehicle travels by using (a) a physical quantity that is estimated on the basis of (i) a vehicle behavior model derived by machine learning using a multiple regression formula, which is configured by a driving force of the vehicle and a traveling resistance that includes an air resistance applied to the vehicle, a slope resistance applied to the vehicle, and a rolling resistance applied to the vehicle, and which determines the physical quantity that varies due to the vehicle traveling, and (ii) the plurality of types of traveling state data of the present time that are acquired, and (b) the physical quantity that is obtained from the traveling state data of the present time that is acquired.