Are These Signs Really Necessary?

I always thought this was pretty common knowledge, but apparently it’s a big enough problem at this intersection that they felt the need to put these two signs right across the road from each other.  I know they don’t get a lot of rain in the area, but what are the other options?  Maybe they had too many people trying to swim or kayak in the flood waters.

4 thoughts on “Are These Signs Really Necessary?

Thoughts?