San Diego Sues DHS, DOD Over Razor Wire Near Mexico Border

The city says U.S. Marines trespassed on city land to install fencing that damages sensitive habitat in an area designated as conservation land.

1 minute read

February 2, 2026, 7:00 AM PST

By Diana Ionescu @aworkoffiction


Close-up of razor wire at top of fence against blue sky.

markmandersonfilms / Shutterstock

San Diego is suing the federal government over new razor wire fencing installed near the Mexico border, reports Deborah Brennan for CALmatters. The city claims the fence “damages sensitive habitat and trespasses on city property.” The property in question is part of San Diego’s Multiple Species Conservation Program and the Cornerstone Lands Conservation Bank Agreement.

The lawsuit is aimed at the Department of Homeland Security and Department of Defense, along with Homeland Security Secretary Kristi Noem, Defense Secretary Pete Hegseth and other federal officials, and argues that U.S. Marines illegally trespassed on city land to build the fences in December.

According to Brennan, “The fences caused ‘irreparable harm to protected plant and wildlife habitats, riparian areas, and vernal pools’ the city argued, saying the fence blocks city access to the site and jeopardizes conservation programs designed to protect that habitat. The city is asking the court to halt any more fence construction and declare the city’s right to ownership and use of the land.”

The Department of Defense declined to comment on the pending litigation, and neither it or DHS have filed responses to the lawsuit yet.

Wednesday, January 28, 2026 in CALmatters

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

Skyscrapers in Jersey City.

New Jersey’s second-largest city bans standalone data centers

Jersey City will continue to allow co-location facilities, such as those meant for research institutions that store their own data.

September 4, 2026 - The Cool Down

A New Jersey train approaches people waiting at the station.

Amtrak not solely to blame for New Jersey commuter rail's unreliability, report finds

A new study from the Garden State Initiative found that NJ Transit’s budget grew 20% across a 4 year period, but reliability declined significantly over the same period.

September 15 - Mass Transit

A tall, gray power plant billows smoke into a blue sky.

EPA erases limits on planet-warming pollution from power plants

Under Monday’s plan, power plants would still have some limits on how much mercury, arsenic and other contaminants they can emit.

September 15 - New York Times

A white RAPID bus. The lower half is light blue, and says RAPID in purple text. The bus is half visible, appearing from the left side of the image.

Phoenix announces new on-demand transit service, more frequent RAPID buses

Both new services will launch in October, and are part of Phoenix's Project Effective Access Solutions for Easing Congestion.

September 15 - KJZZ

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.