Some are lawn companies, some are retired persons and some are teachers who are not at school right now. And it is a lot at one time which is why I noticed it. One company had this giant riding mower for the little tiny city yard (usual where I live) it was cutting - it took like two turns and was finished - that fun and silly. The companies are on some schedule but probably the reason everyone else is out is to get it done before it hits 100 with super humidity later this afternoon and we have pop thunderstorms predicted for the next several days.