Get some basic plumbing repair items. Do you really want to go to a big box store or have some plumber come over during an outbreak?
We have such supplies because, our luck, things break Saturday night or Sunday afternoon. Good luck getting a plumber then for less than the sum of your next paycheck.
I had a leak start under the kitchen sink at 3 AM in the morning on Christmas Eve. First thing in the morning, I went to Lowe's and spent $200 on plumbing parts to do the repair as I didn't want to call a plumber. It was -7F ambient, 15 MPH wind. I fixed it in time to prevent any damage.