Southeast Washington Incident Management Team Takes Command as Weekend Fires Escalate

As three large wildfires erupted simultaneously across southeastern Washington over the weekend of June 14–15, 2026, the Southeast Washington Interagency Incident Management Team (SEWAIMT) stepped up to coordinate a complex, multi-fire response spanning Benton, Franklin, and Walla Walla counties. The response has involved aerial firefighting operations, Washington state strike teams, a Columbia Basin school district serving as a crew base, and coordination with Oregon resources across the Columbia River.

Incident Management Team Activation

Interagency Incident Management Teams (IMTs) are pre-organized groups of trained fire management professionals that are activated when a wildfire exceeds the capacity of local initial-attack resources. The SEWAIMT, which draws personnel from agencies across southeastern Washington, assumed responsibility for managing the response to the Twin Sisters Fire near Wallula Junction and coordinating with teams working the Juniper Dunes incident in Franklin County.

By Sunday afternoon, June 14, the team confirmed that additional IMTs were arriving to assist with fires in the Juniper Dunes area and near the Twin Sisters — a sign of the scale and complexity of the simultaneous multi-fire situation. The team posted evening updates Sunday confirming crews and patrol resources would work through the night.

Aerial Firefighting Operations

Fixed-wing aircraft and helicopters were deployed against all three fires, using water scooped from regional waterways including the Yakima, Snake, and Columbia rivers. Aerial resources are a critical tool in grass and brush fire environments, where ground crews can struggle to safely approach fast-moving fire fronts. Scooper aircraft can make multiple drops per hour using nearby water sources, making the rivers of the Columbia Basin an important tactical advantage for aerial operations in this region.

Aircraft continued operations through Sunday despite wind conditions that occasionally limited flight windows. Tactical aerial support is expected to remain a primary tool as ground crews work to establish containment lines on all three incidents.

Strike Teams and Mutual Aid

Washington state firefighting strike teams — pre-assembled groups of engines and crews — were ordered to assist with all three incidents. Strike teams allow for rapid deployment of standardized resources and are a common mechanism for providing surge capacity during multi-fire situations that stretch local agency resources thin.

The Twin Sisters Fire also engaged resources from Oregon, with crews working the southern flank from across the Columbia River. This cross-border coordination reflects standard mutual aid agreements between Oregon and Washington that facilitate resource sharing during large fire events in the Columbia Basin region.

Logistical Support

Columbia School District in Burbank established its facilities as a staging area and temporary base for crews assigned to the Twin Sisters incident. Using school grounds provides ample space for equipment staging, crew rest, and logistics operations — critical infrastructure for sustained fire response.

Supply logistics, catering, and equipment support for hundreds of firefighters across three separate incidents presents a significant organizational challenge. The SEWAIMT's establishment of incident command posts and use of available community facilities reflects the kind of rapid logistical footprint required when multiple fires strike simultaneously in a rural area.

Looking Ahead

All three fires remain uncontained as of Tuesday morning, and a Red Flag Warning through 11 p.m. Tuesday is expected to produce continued challenging conditions. Fire behavior analysts are forecasting continued active fire behavior with potential for spotting and additional growth during peak wind and low humidity hours mid-afternoon. Crews are prioritizing life safety and structure protection while working toward eventual containment.