Donald Trump’s immigration policies are likely to encourage migrants to risk more dangerous routes into the US, like the journey which this week ended with the death of ten people in a sweltering truck, border security experts have warned.

Dozens of people from Mexico and Central America were found packed into a non-air-conditioned cargo container in a Walmart parking lot in San Antonio at about 12.30am last Sunday.

The deaths are thought to have been caused by heat exposure, dehydration and suffocation. About 30 people were hospitalised.

Days later, at least four people – including two children – drowned trying to cross the swollen Rio Grande near El Paso.

As part of its campaign to crackdown on undocumented migration, the Trump administration wants to force so-called “sanctuary cities” to cooperate with federal immigration authorities, beef up frontier security and surveillance, and – eventually – build a wall along the border with Mexico.



But Alonzo Peña, a former deputy director of US Immigration and Customs Enforcement (Ice), said simplistic strategies would not deter people desperate to join family or seek a better life. Instead, closing off simpler routes would prompt migrants to attempt more dangerous crossings.

“I call it an unfortunate collateral consequence,” he said. “They will put themselves in the hands of unscrupulous criminals that see them as just a commodity.”

Asked if a wall would help, Peña, now a consultant in San Antonio, said: “Absolutely not – it probably will contribute to more tragedies.”

He said building better binational relationships, encouraging information-sharing and more use of informants were key to breaking up networks of smugglers and traffickers.



In recent years, stepped-up frontier security has meant that smuggling activities once orchestrated by small, loosely organised enterprises are being run by bigger, more ruthless and profit-oriented criminal gangs with indirect links to drug cartels.

Packing many people into a truck is a profitable strategy for such smugglers. A large vehicle is a better hiding place than smaller alternatives and reduces the number of trips, making evading detection more likely at busy interior US Border Patrol checkpoints placed along highways near the frontier.

“The policies to enforce the border have the unintended consequence of strengthening transnational smuggling networks and the connection of business with transnational criminal organisations. There’s money there,” said Guadalupe Correa-Cabrera, an associate professor at the University of Texas Rio Grande Valley who studies migration and trafficking. “You are increasing the incentives for corruption on both sides of the border.”

Apprehensions on the south-west border have decreased sharply since Donald Trump entered the White House – a sign that fewer illegal trips are being attempted.

A senior Texas Republican claimed that lax enforcement was to blame for the deaths in San Antonio. Dan Patrick, the lieutenant governor, told Fox News that the incident resulted from “Democrat policies of today, of an open border and sanctuary cities”.



Texas this year passed a law banning so-called sanctuary cities – places that offer little or no cooperation with federal immigration agents. “Border security will help prevent this Texas tragedy,” John Cornyn, a US senator from Texas, wrote on Twitter.

But critics say that such enforcement does nothing to remove the “push factors” behind migration from Mexico and Central America, such as the lack of economic opportunity and violence by street gangs, security forces and crime groups.

A report published in March by the risk analysts Verisk Maplecroft termed Trump’s crackdown “a gift to human traffickers” by driving undocumented workers in the US deeper into the shadows, while a wall “would increase criminal trafficking fees, leaving migrants more deeply mired in debt and vulnerable to exploitation”.

But even this week’s deaths would not curtail demand, Correa-Cabrera said.

“They will still take trucks. They have been taking the journey and nothing has stopped them,” she said. “How many women are willing to take the journey even though they know there is a very high possibility of being raped?”

