From Times Dispatch article:

RVA Fireworks on the James has been postponed from Thursday night until Saturday due to predictions of poor weather, the city of Richmond announced this afternoon.
The entertainment and fireworks festival has been held in and around Brown’s Island on the Fourth of July eve for several years. Because of the postponement, it will be held Saturday evening with the fireworks expected to start about 9:15 p.m.

This means police measures for the neighborhood are postponed to Saturday also.