You’re headed home on a July afternoon, and an hour ago the sky was clear. Now the rain is coming down so hard the wipers can’t keep up, and as you reach a low spot where the road dips to cross an arroyo, there’s water running across the pavement. It doesn’t look deep. The car behind you is waiting to see what you’ll do.
This is one of the easiest decisions in Santa Fe to get wrong, and careful drivers get it wrong all the time. The water looks shallow, you’ve crossed that spot a hundred times when it was bone dry, and you’re almost home.
Here’s what’s worth knowing before you’re the one idling at the edge of the water.
Why our arroyos fool people
They’re dry most of the year, which makes them hard to picture as dangerous. And the rain that fills an arroyo often isn’t falling where you are.
- Water can travel miles downstream and take an hour or more to reach a crossing from a storm you never saw.
- You can’t judge the depth or the speed of moving water from the driver’s seat.
- It takes only about a foot of moving water to float a small car, and a foot and a half to two feet can carry off a truck or SUV.
So the crossing that looks like an inch of runoff can be pushing far harder than it appears, and the ground underneath may already be washing out.
Turn around, don’t drown
It’s a slogan you’ve seen on the highway signs, and it’s there because most flood deaths happen in vehicles. A few plain rules hold up every time:
- If water is moving across the road, don’t drive into it, no matter how shallow it looks.
- Be especially careful after dark, when it’s nearly impossible to read how deep or fast the water is.
- Never drive around a barricade. If a road is closed, it’s closed because someone saw something you can’t.
Around town, the usual trouble spots are the low crossings and underpasses, stretches of Cerrillos Road and St. Francis Drive when a storm parks over the city, and the roads that run near arroyos out in Agua Fría, on the south and east sides, and in the villages like La Cienega, Galisteo, and Tesuque.
What it means for your car and your home
This is worth thinking about before the water’s rising. Flood damage to a vehicle is generally handled under the comprehensive part of an auto policy rather than collision, and the two aren’t the same coverage. For a house it matters even more: most standard homeowners policies don’t cover flooding at all, which surprises people every monsoon season. Flood coverage is a separate policy, and you don’t have to be in a mapped floodplain to need it. An arroyo jumping its banks after a slow, heavy storm is exactly the kind of flooding a regular home policy leaves out. If you’ve never looked at where water actually goes on your property, or how close the nearest arroyo really is, this is the season to find out, and to understand what your coverage does and doesn’t include before you need it.
Worth Keeping in Mind
The good news about a flash flood is that it drops almost as fast as it rises. Waiting ten or fifteen minutes in a parking lot is a lot cheaper than a flooded engine, and far safer than guessing. By tomorrow the arroyo will be dry sand again, which is exactly why it’s so easy to forget how much power was moving through it today.