When you're headed out to the back country this summer, surviving a vehicle water crash is probably not on your mind. But maybe it should be. The National Highway Traffic Safety Administration reports that 600 people perish each year in the U.S. by drowning inside their vehicles. So if you're route to the trailhead crosses or passes water, be prepared.

The first thing to remember if your vehicle hits water is to stay calm. That's not the easiest thing to do when your car is sinking, but if you don't, you could become a statistic. Unfasten your seatbelt and try to open your door as quickly as possible. If your headlights are on, leave them on; it makes it easier for rescuers to find you and your car.

If the car sinks quickly and water pressure won't let the door open, break a window. Take a deep breath, then kick a window wearing sturdy boots. If that doesn't work, use a heavy flashlight or a large screwdriver that you've stashed in the glove compartment or side pocket (preparation!) and smash the glass. Water will start to pour in but push through it until you're outside your car.

Leave your gear and pack behind, but keep your shades on, because they can protect your eyes from debris in the water. Swim or kick up towards the light. If you've become disoriented, breathe out a little, and watch the bubbles; they'll go up so follow them. Once you break the surface, look around and find the nearest shore, and head to it. Unless you're an expert swimmer trained in water rescue, don't try to save your friend(s). You could all end up in critical condition, especially if the water is cold.

Back on the road, wave down passing cars to get help. Then slow down; your adrenaline rush will have kept you from feeling much pain, and that will probably kick in now. You also need to get warm to avoid shock. The faster you can get help, the more likely that you and anyone still in the car will survive.