This is the front line in the battle for Marib: a gas-rich region of Yemen, and the last stronghold of the country's internationally recognized government.
Fighting has raged here for months and a Houthi victory would hand the group complete control of the northern half of Yemen.
Some experts say that could have ripple effects across the country and scupper U.N. efforts to secure a nationwide ceasefire.
UN Humanitarian Coordinator for Yemen Lise Grande says the fighting has displaced nearly a million people.
"We know that any intensification of the conflict will put them at extreme risk and we are very worried that many of the people who live in Marib city will themselves become displaced by the conflict."
One of the displaced is Mohamed Abdullah Qassim.
He says he and his family had to move camps when the fighting came near, and that now they've been left with nothing except tents.
The Saudi-backed government of President Abd-Rabbu Mansour Hadi was ousted from power in the capital, Sanaa, in late 2014 by the Iran-aligned Houthi movement.
In April, another separatist group declared self-rule in Aden, which had been the interim seat of government.
Now, after six years of civil war that has claimed more than 100,000 lives, Houthi forces have been advancing in the government's last bastion, seizing six districts and large parts of Sarwah, just a few dozen miles from Marib city.
It is the last line of defense before Yemen's biggest gas and oil fields, but the Houthis' progress has been slowed, and victory is not guaranteed.