Will taking unpaid leave hurt tenure process? I am in the last year of my tenure clock and will be submitting my tenure package this Fall.  However, I will not be able to teach on campus this Fall partly due to COVID-19 disruption (school closing means I will have to stay home with my children).  If teaching on campus is required (not yet finalized), I would have no choice but to take an unpaid leave.
Will taking an unpaid leave hurt my tenure process?
I did some basic research.  There are nothing specific in faculty handbook, nor can I find anything in the official tenure procedure book.
Taking an unpaid leave of absence would often factor into tenure decisions. I would begin a discussion with you department head today. Express your concerns. COVID-19 is a very unique circumstance. Surely they could find a way for you to teach remotely if you start a discussion right now.
If I was a department chair, I would be finding ways to accommodate my faculty. But I would also want to have that discussion as soon as possible.
What you definitely do not want to do is wait until a month into the semester to inform your department that you are not going to be showing up. (We had a professor do this a few years ago and he was obviously fired).