Where to begin searching

I wrote a few weeks ago regarding an elderly neighbor who was mowing the leaves in the middle of the road in the dark.  We have now had a whole week of his constant gas-generated leaf blower blowing up and down the street all day long into the night, then after the leaf blower the lawn mower.  He has no lights or anything so don't know how he can see what he is doing because we also don't have street lights.  If he hits a rock (which is usually what you find in roads) it could be dangerous to others.  We are not the only ones noticing it.  Four of our neighbors have come out of their home to look to see what is going on.  Most likely because they can't even enjoy their dinners or a night with him walking up and down the road doing this.  He goes up then down then up then down blowing the leaves and dirt back and forth.  Today was unbelievable.  We looked out and there he was standing on the neighbors roof blowing the leaves off their roof.  This is a 70+ year old man who is not very steady on his feet.  Tonight here it is after dark and he is blowing the leaves back and forth and the dirt in the street. 

I would like to make an anonymous inquiry to have someone come out and check on him and find out why he is doing this.  On top of it all it's dark and he's wearing dark clothing and a car came down the street and didn't even see him.  He walked up onto the curb, but if he fell the car would have hit him.  This is just crazy.  But I don't know the first step of who we need to contact.  I don't want it getting out that we are the ones who reported this.

Can anyone give me any ideas of where to begin. 

Thanks.