The National Weather Service issued a Severe Flood Warning for the Frio River near Derby in Frio County, Texas, on 22 July 2026, with the warning active through 23:00 CDT that day. Authorities reported that moderate flooding was occurring at the affected location and that minor flooding was forecast as the river level changed.
Why the warning matters and expected timing
The advisory affected residents and motorists in the immediate floodplain and low-lying areas adjacent to the Frio River near Derby. Forecasts indicated the river was expected to fall below flood stage late the following morning but could continue to produce localized inundation of low-lying roads, yards and crossings even after the official stage dropped. The continued presence of standing or moving water in flood-prone areas represented an ongoing hazard to people and vehicles during the advisory period.
Observed impacts and public safety guidance
Officials described current conditions as moderate flooding with minor flooding possible as levels changed, and they reiterated that a Flood Warning signified flooding was imminent or already taking place. In case of emergency, residents were told to dial 911. Safety guidance emphasized not to walk, swim or drive through floodwaters; motorists were urged to “stop, turn around, and find an alternative route” if they encountered rising water. Additional caution was advised when walking near riverbanks where erosion and unexpectedly deep water can present risks.
Authorities continued to monitor river stages and local forecasts and provided crest timing and stage expectations to support response and planning. Residents in Frio County near Derby were advised to remain alert to updated forecasts and to follow instructions from local emergency managers as conditions evolved. Last update: 22 July 2026. The warning schedule indicated the river was expected to recede below flood stage the next morning, but localized flooding in low-lying areas might persist beyond that timing.
