We get sediment in our water after heavy rainfall sometimes, and any time the city flushes the pipes. Not enough to be visibly noticeable really, but enough to clog aerators all at once.
If you're worried tonight, you could probably filter through a paper towel or coffee filter and then boil it before use.
Also, if you're on city water, you utility should have an after hours line you could call. Every city I've lived in does.