Border 6 Fire

Here is a detailed situation report on the Border 6 Fire based on the latest official updates over the last 72 hours.

Fire Start, Size and Growth

Start Date/Time/Location: The Border 6 Fire ignited at 1:54 p.m. on Monday, June 1, 2026. It is burning in the Tijuana River and Marron Valley area in the unincorporated Dulzura community of San Diego County, California, roughly 30 miles southeast of downtown San Diego near Tecate Peak.
Size and Containment: As of Friday morning, June 5, 2026, the fire has burned 2,525 acres (1,516 acres in the United States and 1,009 acres in Mexico) and is 85% contained.
Fuels, Growth and Rate of Spread: The fire originated in Mexico and crossed the border into the United States. It is burning in remote, rocky, and rugged mountainous terrain with dense, dry vegetation. The fire initially exhibited a fast-moving rate of spread driven by wind and steep slopes but has since seen minimal activity due to moderating weather conditions.
Containment Efforts: Unified Command involves the CAL FIRE San Diego Unit and San Diego County Fire, with a San Diego Type 3 Incident Management Team assigned. There are currently over 600 personnel assigned to the fire, including 31 engines, 12 water tenders, 5 helicopters, 6 dozers, and 19 hand crews. Ground and aerial resources are making steady progress, reinforcing containment lines, and conducting mop-up operations on remaining hot spots. Crews have also begun suppression repair operations to rehabilitate existing roads and backhaul debris.

Emergency Information

Evacuations and Sheltering:
Mandatory Evacuation Orders: All evacuation orders have been successfully lifted as of June 4, 2026.
Evacuation Warnings: All evacuation warnings, which previously affected zones such as SDC-2544, SDC-2545, SDC-2605, SDC-2643, SDC-2644, and SDC-2645 near Marron Valley Road, Dulzura, and Barrett Junction, have been lifted.
Curfew: There are no curfews reported for the area at this time.
Evacuation Shelters and Information: Temporary evacuation facilities, including a shelter at the County of San Diego Community Center in Spring Valley and a temporary evacuation point in Rancho San Diego, were closed on the evening of June 3, 2026, as the threat to the community diminished.

Road and Infrastructure Closures:

• All road closures associated with the fire were lifted as of 5:00 p.m. on Thursday, June 4, 2026. This includes previous closures at Barrett Truck Trail, Tecate Peak Road, and Marron Valley Road.

For more information, visit:

• CAL FIRE Current Incidents Overview
• San Diego County Emergency Site
• CAL FIRE San Diego Official Updates

Current Impact

Impacts:
Injuries and Fatalities: There have been no civilian or firefighter injuries or fatalities reported in connection with the Border 6 Fire.
Structures Impacted: Fire officials report that no structures have been damaged or destroyed by the fire.
School and Business Closures: There are no widespread school or business closures currently in effect.
Notable Impacts: The fire is a significant cross-border incident, heavily impacting the binational region near Tecate Peak and Marron Valley, requiring coordination and monitoring on both sides of the U.S.-Mexico border.

Safety Concerns:
Power Outages: No fire-related power outages have been reported.
Water Safety: No specific water safety concerns have been reported, but residents should continue to monitor local advisories.
Burn Bans: Residents should adhere to standard CAL FIRE and San Diego County seasonal fire restrictions.
Air Quality: While the fire's spread has been halted, a smoke advisory remains in effect for nearby communities, particularly areas near Tecate and Campo, due to lingering smoke impacts. Residents with respiratory conditions are advised to stay indoors, keep windows closed, and use air purifiers if possible.

Ongoing Outlook

Containment Projections: Firefighters have achieved 85% containment and expect to reach full containment soon. Ground crews will remain on the scene to patrol the area, reinforce control lines, and extinguish any remaining hot spots within the fire's perimeter to ensure the fire does not jump the line.
Weather and Wind Warnings: Increased moisture and cooler temperatures moved into the area early Thursday, creating highly favorable conditions for firefighters to improve containment and continue mop-up operations. No red flag warnings or high wind warnings are currently active for the immediate fire area.

Cause and the Role of Weather and Climate

Cause: The official cause of the Border 6 Fire remains under investigation by authorities.
Weather and Climate: The fire's rapid initial growth was fueled by dry vegetation, warm inland temperatures, and gusty winds. The rugged topography combined with the region's arid climate created an environment where the fire could quickly run in alignment with wind and steep slopes. However, a recent shift in weather, bringing cooler temperatures and overnight precipitation, has significantly aided suppression efforts over the last 48 hours.

For more information, visit:

• CAL FIRE Current Incidents Overview
• San Diego County Emergency Site
• CAL FIRE San Diego Official Updates