The rapid offensive, which caught most observers off guard, has seen the Iranian-backed rebels overrun territory held by the Saudi-backed National Resistance coalition. In a matter of days, much of the anti-Houthi forces' holdings along Yemen's strategic Red Sea coast have fallen.
"Now that they are there, they're going to be entrenched," said Hisham al-Omeisi, senior analyst at the Brussels-based European Institute of Peace. "And it's going to be a lot more costly to push them out."
The advance demonstrates the Houthis' resilience despite a 12-year civil war, devastating Saudi air raids, and attacks by American, Israeli and British forces. The group's ability to move quickly and hold ground suggests a significant shift in the balance of power on the ground.
Analysts warn the development could entangle the broader conflict between Iran and Western powers. The Houthis, long backed by Tehran, now control a substantial stretch of coastline along one of the world's most important shipping lanes. The capture comes days after oil prices breached $100 a barrel for the first time since July, following US and Houthi strikes.
With their opponents reportedly stunned and demoralised, the Houthis are expected to consolidate their new positions, making any recapture by coalition forces increasingly difficult.