I'm wondering the same thing...problem is, who knows what got into the lines, if you had water main breaks?
I usually do my tanks (WC's) on the weekends, may skip this weekend, until the water lines have been used alot...also, consider that your local utility may increase the amount of chloramine they use after this event, my town always does, and they (usually) advise us of it....in the past when that's happened, I just increase my dosage of Prime...but still may skip this weekend.
If you've been doing regular WC's, your fish should be just fine skipping a week...