Generally, when water just reaches the level of the tires, completely submerging the vehicle's chassis and causing water to enter the interior, it is referred to as a flooded vehicle. For this type of vehicle, as long as the chassis and interior are not submerged in water for an extended period, the issues are not too severe, and later maintenance of the vehicle's chassis and interior can address the problems. There are six levels of vehicle flooding: Flood Level 1: Water just reaches the vehicle's chassis, and the floor may become damp, but the likelihood of significant water ingress is low, with minimal impact on the vehicle's electrical equipment. Flood Level 2: Water reaches halfway up the wheels. Due to the vehicle's incomplete sealing, water will begin to enter the interior. For lower-bodied sedans, the water level inside may affect the seat adjustment motors and electrical components like heating and ventilation. Flood Level 3: Water almost completely submerges the tires. At this point, the water level inside will fully submerge the seat cushions and the central armrest area, affecting a large number of electrical devices. Flood Level 4: Water reaches the engine hood. The water level inside rises to the vehicle's dashboard, and the headlights and the engine's air intake in the engine compartment begin to take in water. Flood Level 5: Water completely submerges the engine hood. At this stage, nearly all the vehicle's electrical equipment will be affected by the water. Flood Level 6: Water submerges the roof. The vehicle's headliner and sunroof module will be impacted, and all interior components will be submerged.
