For anyone who needs to cool someone off because they are overheated, this is a method that works as long as it is not too humid.

Put them in front of a fan blowing air on them and spray a mist of water over as much of their skin as you can. The mist sticks to their skin and evaporates quickly in the blowing air. When it evaporates it takes heat our of their body.

A big fan can cool someone off pretty fast. They might not be able to stand more than about 60-90 seconds of this before they begin to feel too cool.

The fan is what makes the difference, accelerating evaporation and moving the warm, humid air away from them.

It must be mist and not liquid water, because the mist has much less surface tension and more surface area than liquid water on the skin. So, it evaporates faster, and that cools the body faster.

I have a lot of experience with this effect. It works.

Seen in Oakland, California.

One major challenge this project held was a sewer lateral on the fence line. On the left there was a low concrete wall and under it was the sewer lateral. I mounted posts on top of the concrete wall and added wood in front onto which the horizontal fence boards would later be attached.

But, I still needed two more posts on the fence line but could not dig holes because of the sewer lateral. So, I dug holes about 3' off the fence line and attached them to posts that were on the fence line, but were just sitting on paving stones. The offset posts kept the fence line posts in position.

I added a structure between the vertical posts, and connected all the vertical pieces with a 2x4 across the top.

In the photo you can see one of the offset posts. The other is behind the shed.