It doesn't matters what caused it. This could be a natural event (local flooding from storm or snow). Maybe it's a man-made or special event in another precinct (crowd control, concert or big crime scene). Your relief shift all ate at a bad restaurant and checked off with an irritable bowel. So, now after your long day, you have another four to eight hours of work facing you.
How to survive this is easy — get your mind right first. This is going to occur from time to time, so deal with it. You have had a bad day already, a couple of domestics in hot hovels, one crash investigation in the sun and you are hot, gritty and tired. So what's going to perk you up to face this next shift?
If you have an issued car, keep a small bag in the trunk. If your department utilizes a car fleet, then keep this in your privately owned vehicle trunk or in your locker. This won't take up much space, but will make life a little more livable. This is not a bug-out bag but a small little bag to help you over the hump and maybe more pleasant to be around. The bag can be anything, this is not a call for the latest black tactical molle compliant bag, and an old gym bag works well.
A fresh pair of socks keeps the dogs from barking.
Clean T-shirt — One shift is enough. Under the vest, you can get woofy.