The National Weather Service kept a Red Flag Warning in effect through 11 p.m. PDT on June 6 for parts of California, including the Lower Colorado River Valley and the Central Deserts, while a concurrent Fire Weather Watch remained posted for specified zones in the same region. The covered area also extends into the Yuma/Martinez Lake vicinity across the state line in Arizona, with critical conditions expected to persist until the stated expiration time. Last update: June 6, 2026.
The alert matters because strong southwest winds and very low relative humidity can cause any ignition to spread rapidly. The combination of gusty windssingle-digit humidityand only modest overnight recovery increases the potential for fast-moving wildfires that challenge initial attack and containment efforts.
Red Flag Warning through late June 6 in Lower Colorado River Valley
The Red Flag Warning covers the Lower Colorado River Valley CA and adjacent Central Deserts from the morning of June 5 through 11 p.m. PDT on June 6. The inclusion of Yuma/Martinez Lake and vicinity in Arizona reflects the cross-border fire weather pattern along the river corridor. Under a warning, weather conditions are expected to be favorable for rapid fire spread, and residents and visitors are urged to avoid all outdoor burning and open flames and to maintain clear defensible space around structures.
Officials advised that any fires that develop could spread quickly in the warning area. People should stay alert for rapidly changing conditions, follow instructions from local authorities, and call 911 in emergencies. Clearing dry vegetation, securing equipment that might spark, and postponing activities that create embers can reduce risk during the warning period.
Fire Weather Watch parameters: zones 131, 132, 231
A Fire Weather Watch remains in effect for fire weather zones 131, 132, and 231 through 11 p.m. PDT on June 6. Forecast winds are southwest 15 to 20 mph with gusts up to 35 mph, with minimum relative humidity as low as 9 percent and only modest overnight recovery. A watch is an advance notice that conditions could become critical; residents are advised to inform appropriate officials and fire crews, properly discard cigarettes, and be ready to evacuate if necessary.
The watch overlaps portions of the California deserts near the Lower Colorado River Valley and complements the adjacent warning areas. The specified wind speeds and low humidity levels are sufficient to produce rapid rates of spread on new or existing fires, especially in fine, cured fuels typical of desert environments.
Areas affected and safety guidance
The combined alerts cover the Lower Colorado River Valley CA, the Central Deserts, and the Yuma/Martinez Lake area along the Arizona side of the river. Communities within and near these zones should monitor official updates and be prepared for elevated fire behavior. The National Weather Service and local emergency agencies recommend avoiding outdoor burning, securing trailer chains, and refraining from target shooting or any activity that could generate sparks while the Red Flag Warning and Fire Weather Watch are active.
Residents are encouraged to maintain clear defensible spacestage go-bags, and review evacuation routes in case conditions deteriorate. Any new information on timing, coverage, or weather parameters will be shared through official channels as the alerts approach their scheduled expiration.
