A red flag warning will be in effect Saturday from noon to 9 p.m. throughout Harris County, according to a forecast issued by the National Weather Service on Friday afternoon. The forecast, which was issued by the agency around 3 p.

A red flag warning does not necessarily mean there is a fire ongoing – extreme fire weather conditions are either occurring now, or will shortly, according to the NWS. If a fire does start, it has the potential to quickly become extreme due to the critical fire weather conditions.