Haiti – The US military's Southern Command is sending eight helicopters to assist in the disaster relief effort in Haiti after an earthquake devastated a remote region of the country, making access difficult.

The deployment is double what Southcom detailed on Sunday and includes three CH-47 Chinooks and five UH-60 Black Hawks.

The US Agency for International Development (USAID) is leading the American effort to deliver supplies to the Caribbean nation.

But officials say the relief mission has been slowed because the 7.2-magnitude earthquake hit the country's southwestern peninsula, which is only accessible by single-lane roads.

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Those roads are unsafe due to the turbulent security situation that has unfolded in Haiti since the assassination of its president, Jovenel Moïse, last month. The roads have also been battered by recent flooding, mudslides, and the earthquake.

And a storm that will reach the island within hours is expected to make the situation worse.

All eight helicopters are from Joint Task Force-Bravo based in Honduras, a Southern Command spokesperson said.

"Some are currently staging in Jamaica, and the rest are en route to Jamaica," the spokesperson told McClatchy. "If weather conditions permit, some of the helicopters may arrive as early as this evening."

"The safety of our aircrews is paramount, so if weather conditions this evening are not safe enough for flight operations, their scheduled arrival in Haiti may be delayed until conditions are good enough for flight operations to safely resume," the official said.

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"The current mission focus for Joint Task Force-Haiti is to conduct life-saving and assessment support to the ongoing foreign disaster assistance effort led by the U.S. Agency for International Development," the spokesperson said.

Southern Command earlier Monday said that the helicopters would be providing air transport to move USAID disaster relief personnel and supplies to affected areas.

Southern Command would not comment on whether US troops would be deployed to secure the country's roads. But the situation may demand it, experts say.

"I could envision logistical support on the ground to be able to ferry whatever it is that's needed to isolated areas," said Georges Fauriol, an expert on Haiti and senior associate at the Center for Strategic and International Studies.

"Road traffic in Haiti has actually become rather dangerous, so I could envision a limited deployment in that context."

The last time the United States sent troops to Haiti was in 2010, after the 7.0-magnitude earthquake left 300,000 dead.

Saturday's earthquake resulted in the deaths of at least 1,300 people, according to the Haitian government.

A USAID official said that the death toll could rise as additional rescue teams reach the disaster zone.

While the White House has been consumed by the frenzied withdrawal from Afghanistan, National Security Council (NSC) officials have been holding daily meetings on the crisis in Haiti, administration officials said.

"The National Security Council organized several interagency calls on Saturday to share updates on the ground and to coordinate response efforts – and the NSC has held daily interagency calls since to ensure close coordination between agencies across government as well as between staff on the ground and back in the United States," a White House official said.