Allison, If the weather is that bad, Minnie is probably using her survival instincts and hiding out somewhere. Chances are, she is somewhere close. Just keep walking around, calling her, especially at night when the traffic is gone and it is quiet. I would also offer a reward - since you are in an apartment with what sounds like lots of kids, it will give them an extra incentive to be on the lookout. (Beware, though, I got some cruel calls when I put up all of the signs.) I would leave her regular food out for her, in addition to the tuna. If you have a balcony or little porch, put stuff out there for her to smell (if you can keep it dry!). I hope the weather improves soon.
Shana