That tunnel picture looks abandoned to me. I guess I have seen too many scary movies, as to what may be in there. You don't know how long it is, or what might be in there. It may be fully functional, who knows for sure. Whatever it is, I wouldn't be going in to find out.
We may get some rain today, who knows. Yesterday I lost electricity for a while. That stunk because the temp was hovering close to 100 deg. It was sunny and breezy. Even my mom mentioned yesterday that she has never seen such wind in the summer before. I agreed. The only time I see wind or breeze in the summer is when a storm front is rolling in. Once the storm passes the wind goes back down. It is so dry I am still leaving some water out for the poor birds. I dump the water before dark. I don't want wild animals to be attracted to my yard, or mosquitoes.