The National Weather Service issued historic red flag warnings across multiple Western states and escalated to a Particularly Dangerous Situation (PDS alert) for parts of southwest Utah as dangerous fire weather persisted into the weekend. The expanded alerts covered central and southwest Utah and portions of Southern California, where winds and low humidity were primed to accelerate new ignitions and rapid spread.

The alerts mattered because they signaled conditions under which safe and timely evacuations may be difficult and small sparks could become fast-moving fires. Utah faced several large and active blazes, including the Cottonwood Fire near Beaver and the Iron Fire threatening Eureka, while Southern California’s deserts and mountain passes saw gusts strong enough to topple branches and power lines.

Southwest Utah under PDS alert and statewide red flags

Forecasters placed southwest Utah under a rare PDS fire weather designation, a step beyond a standard red flag warning reserved for worst-case combinations of wind and humidity. Meteorologists described the threshold as sustained gusts reaching about 55 mph or more alongside single-digit relative humidity near or below 10%, a combination that fosters explosive fire growth and long-range ember cast.

The PDS zone sat within a broader Utah red flag footprint that extended from the southwest into central and southern mountains. The dangerous outbreak was expected to last through the weekend in some areas, with advice for residents to prepare emergency kits, identify multiple evacuation routes, and avoid activities that produce sparks, such as equipment use on dry grasses.

Darren Van Cleave, a meteorologist with the weather service, described the purpose of the designation plainly: “We need a tool to communicate the severity of the situation when it goes beyond the usual warnings,” he stated. Officials noted the PDS tool has been used sparingly and was intended for episodes like this one, when wind, humidity, and existing large fires converge over wide terrain.

Major fires in Utah: Cottonwood and Iron threaten communities

The Cottonwood Fire near Beaver grew rapidly after igniting on Monday, driven by gusty winds over extremely dry fuels. By late Friday, it had burned nearly 72,000 acres, forcing evacuations and threatening homes. The blaze ranked among the state’s larger fires in recent memory, fueled by a low snowpack year and a spring heat wave that accelerated runoff and cured vegetation earlier than usual.

Crews also battled the Iron Fire which started on June 19 and expanded to about 40,600 acres. Containment reached roughly 38% by late Friday, though the margin remained tenuous in high winds. The fire pushed toward the historic mining town of Eureka, where authorities temporarily cut electric service for safety and ordered residents of Eureka, Mammoth, and Silver City to evacuate as flames approached.

Additional new starts emerged in central west Utah, including Juab and Millard counties, further stretching air and ground resources. Fire managers shifted personnel and equipment to protect populated corridors, critical infrastructure, and evacuation routes, while warning that downed power lines and rolling embers could ignite spot fires a significant distance from the main fronts.

Southern California winds, low humidity, and holiday fire risk

Across Southern California red flag warnings remained in effect for portions of San Bernardino, Kern, Inyo, and Tulare counties until 11 p.m. Saturday. Forecasts called for 35 to 55 mph gusts and relative humidity between about 6% and 15% from Death Valley National Park and the Mojave Desert to Morongo Valley, Yucca Valley, and the Lower Colorado River Valley. Any ignition under those conditions could spread quickly, complicating initial attack.

The California Department of Forestry and Fire Protection urged those in warning areas to be evacuation-ready, with go bags, signed-up alerts, and defensible space around structures. The Governor’s Office of Emergency Services prepositioned crews and equipment in Inyo County and advised residents to register for notifications. With the Fourth of July holiday nearing, agencies reiterated that only designated “safe and sane” fireworks are legal in California and that many cities, including Los Angeles, San Diego, and Long Beach, ban personal fireworks entirely.

Authorities cautioned that illegal fireworks can spark wildfires, cause severe injuries, and carry criminal penalties, including fines and possible jail time. They also warned that strong winds could drop limbs or power lines, potentially starting new fires or causing localized outages. Communities were advised to keep multiple ways to receive alerts and to avoid outdoor burning or spark-producing work until conditions ease.

Western pattern and preparedness outlook

The PDS alert in Utah formed part of a broader Western pattern spanning at least nine states, including Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, and Alaska, where red flag warnings covered broad swaths of dry and windy terrain. Forecasters signaled that while the PDS designation is expected only rarely, conditions already pushed limits this season, and further alerts could be issued if wind and humidity thresholds persist.

Emergency officials emphasized practical steps: ensure vehicles are fueled, keep vital documents accessible, and map secondary evacuation routes in case primary corridors close. Residents were urged to avoid using equipment that can create sparks in dry grass, maintain situational awareness, and heed evacuation orders promptly where issued.

Last update: June 28, 2026. Authorities said the red flag and PDS alerts would be reassessed as wind fields and humidity evolve through the weekend. Communities in Utah and Southern California were asked to monitor official updates closely, with the understanding that rapid changes in fire behavior could occur with little notice under the prevailing conditions.