Shifting Routes: Cartels Adapt Smuggling Tactics Amid Border Enforcement
As direct border crossings plummet, reports indicate a strategic pivot by smuggling networks toward subterranean infrastructure, raising new questions about enforcement capabilities and migrant safety.
Mexican drug cartels are reportedly expanding their use of cross-border tunnels and municipal sewer systems to move migrants into the United States. This shift appears to be a direct response to the Trump administration’s intensified efforts to reduce illegal crossings to near-zero levels, according to a report from the Los Angeles Times. The adaptation reflects a broader trend in which smuggling networks are repurposing routes previously reserved for narcotics to accommodate human cargo as traditional pathways become increasingly difficult to traverse.
The timing of this operational change coincides with a significant decline in apprehensions at the U.S.-Mexico border. U.S. Customs and Border Protection data indicates that daily migrant apprehensions have fallen to historic lows, averaging approximately 400 in July, compared to thousands during the 2022 surge. At certain points, the daily figure has dropped to around 200. This reduction in detected crossings has prompted White House officials, including Deputy Chief of Staff Stephen Miller, to push for further investigative measures against smuggling networks, citing a need to close remaining gaps in enforcement.
Infrastructure Becomes a Smuggling Channel
As surveillance and physical barriers have strengthened, smugglers are reportedly utilizing drainage and sewer connections to bypass detection. Some tunnels now link directly with these systems, allowing migrants to emerge deeper inside the United States rather than at the immediate border line. In one instance in May, authorities discovered 19 migrants, including three unaccompanied minors, emerging from a storm-water drainage system in San Diego. In El Paso, a tunnel extending from Ciudad Juárez was found to connect with the city’s sewer network, with migrants reportedly surfacing through a manhole into a waiting vehicle.
David Shirk, director of the Justice in Mexico program at the University of San Diego, noted that robust border enforcement has increased the demand for alternative passage methods. According to an official cited by the Los Angeles Times, smugglers charge Latin American migrants up to $15,000 for tunnel access into El Paso, while migrants from the Middle East or Southeast Asia may pay as much as $25,000. These high fees reflect the increased risk and complexity associated with using subterranean routes compared to traditional land crossings.
Declining Crossings Alter Enforcement Priorities
The changing nature of smuggling is occurring against a backdrop of fewer migrants attempting to reach the border in the first place. Reuters reported that migrant shelters in Ciudad Juárez are operating at roughly 15% occupancy, suggesting that some individuals are choosing to settle in Mexico rather than risk the journey. This trend has allowed Border Patrol to shift resources away from conventional crossing points and toward highway checkpoints and maritime patrols, aiming to detect migrants who evade detection at the border.
El País reported last week that apprehensions have fallen 95% from 2023 levels, a drop that has enabled agents to focus on other areas of enforcement. According to GN geopolitics/migration (en-US), this reallocation of resources underscores the evolving dynamic between enforcement strategies and smuggling adaptations. The next phase of this development will likely hinge on whether authorities can effectively identify and disrupt these subterranean networks, or if smuggling groups will continue to refine their use of urban infrastructure to maintain flow.
