Before I watched this video warning against driving most cars through water on the road that is 6 to 8 inches (15 to 20 cm) deep, I probably would not have considered it to be worth my while to find another way around. With flood warnings currently being issued for various parts of BC, the knowledge shared here could help you avoid thousands of dollars in repair costs.
In addition to fatal damage to the engine or transmission, vehicle electronics and brakes don't do well when they get wet. Electronics stop working and brakes can crack or warp due to the temperature change from being dipped in cold water.
Wet brakes don't work well if they do survive the trip so make sure to test them once you are on the other side.