Full Breakdown
Red Flag Warning Triggers Widespread Power Shutoffs Across Northern California
6/13/2026, 12:46:37 AM
Background & Context
On the night of June 10 2026 the National Weather Service (NWS) issued a Red Flag Warning for the North Bay and Sacramento Valley, citing triple-digit temperatures, low-teen relative humidity and strong winds—conditions that can cause rapid wildfire spread. A concurrent heat advisory covered Napa, Sonoma, Lake and surrounding counties.
Timeline of Events
- June 10, 11 p.m. – NWS begins the Red Flag Warning; winds expected to reach 35-40 mph with gusts up to 60 mph.
- June 10, overnight – Pacific Gas & Electric (PG&E) initiates public-safety power shutoffs (PSPS) in eight counties (Colusa, Glenn, Lake, Napa, Sutter, Sonoma, Tehama, Yolo).
- June 11, early morning – Temperatures peak (98-102 °F) across the North Bay; PG&E restores power to most Sonoma customers by 1 p.m., but 774 Napa customers remain off-grid.
- June 11, mid-day – Red Flag Warning lifted as winds subside; heat advisory ends at 11 p.m.
Data & Statistics
- Temperatures: 98 °F at Charles M. Schulz Airport; 100-102 °F in Cloverdale, Healdsburg, St. Helena.
- Wind: Overnight gusts 35-40 mph (NWS) and 45-60 mph in mountain areas; sustained 15-25 mph with gusts to 40 mph per Sacramento NWS.
- Humidity: Low teens throughout the warning period.
- Customers Affected: Reports vary—4,400 (Cal OES), 4,621 (PG&E), “just under 5,000” (PG&E). Counties impacted: Colusa, Glenn, Lake, Napa, Sutter, Sonoma, Tehama, Yolo.
- Fire Activity: Putah Fire (?860 acres, 60 % contained) and multiple grass fires in Sacramento-area neighborhoods.
Impact on Residents
The heat advisory prompted PG&E to open community resource centers: First Congregational Church (Sonoma), Napa Elks Lodge, and a fair-grounds site in Petaluma, offering cooling stations, portable batteries and ADA-accessible restrooms. Sonoma County’s emergency management did not open cooling centers, citing the three-day heat-threshold rule. Fire officials warned that equipment sparks, unsecured trailer chains and mowing dry grass could ignite fast-moving fires.
Official Statements & Responses
- NWS meteorologist Rachel Kennedy warned that “relative humidity will remain low” and urged caution for outdoor work.
- PG&E spokesperson Tamar Sarkissian explained that gusty winds can uproot vegetation and “lead to outages” if debris contacts equipment.
- Capt. Mark Nunez (Sacramento Metropolitan Fire District) emphasized that simple actions such as mowing dry grass or dragging trailer chains can quickly ignite vegetation.
- Kent Carlin, Alameda County Fire battalion chief, described the warning window as brief but capable of “rapid fire growth and quick spread” in light fuels.
- PG&E announced the resource centers to aid residents during potential outages and extreme heat.
Criticism & Opposition
Sonoma County officials declined to open cooling centers because the heat advisory did not meet the three-day threshold, drawing criticism from community advocates who argue vulnerable residents need immediate relief. Additionally, some residents expressed concern that preemptive shutoffs could disrupt essential medical equipment and home-based businesses.
Conflicting Reports & Gaps
- Customer counts differ across sources (4,400 vs 4,621 vs ?5,000).
- Wind forecasts vary: 35-40 mph overnight gusts (NWS) versus 15-25 mph sustained with 40 mph gusts (Sacramento NWS).
- Temperature extremes are reported as 101 °F in some towns and 102 °F in others, indicating minor inconsistencies in local forecasts.
Verbatim Quotes
- “Well, we can get, pretty serious any time we get a warning like that. Even if it's a short duration, like the one we're going to experience, it's probably only 24 hours, but it's got the potential for rapid fire growth and quick spread, especially in some of the lighter fuels like you're going to find in eastern Alameda County with the with the grasses,” — Kent Carlin, Alameda County Fire battalion chief
- “When we see gusty, windy conditions, we often will see things like vegetation, otherwise healthy trees being uprooted, debris flying through the air.” — Tamar Sarkissian, PG&E spokesperson
- “And if those things land in our equipment, it can lead to outages," said Tamar Sarkissian, a PG &E spokesperson.” — Tamar Sarkissian, PG&E spokesperson
- “Simple actions such as mowing dry grass, welding, grinding, or dragging trailer chains can quickly ignite vegetation and lead to fast-moving fires,” — Capt. Mark Nunez, Sacramento Metropolitan Fire District
- “I needed some AC for real, this is crazy.” — Mirabel Lopez, Santa Rosa resident
What’s Next
Forecasts call for a modest temperature drop on Friday (highs 86-87 °F in Santa Rosa, 93 °F in St. Helena) but still above seasonal norms. PG&E warns that additional shutoffs remain possible if wind gusts intensify or humidity stays low. Residents are advised to monitor the PG&E outage map and continue fire-prevention precautions as the region transitions out of the Red Flag period.
