The Houthis increased attacks on Israel in the fall and winter of 2024.
Israel responded several times. However, they kept up their threats.

The group briefly stopped attacking during the ceasefire in Gaza from January to March.

When the US began strikes on March 15 and Israel began strikes on Gaza on March 18, the Houthis renewed their attacks.
They launched four missiles in three days; two on May 2, one on May 3, and one on May 4.

The Houthis still have their missile capabilities.
It is difficult to hunt down missiles that are wheeled out of caves in mountains. It is hard in general to find mobile missile launchers.

This is part of a long history that shows that groups like the Houthis can do without airports. The fact that they did not have air power did not stop them.

The Vietnamese, for instance, were able to move artillery across Laos and Cambodia and into position to strike the US in Vietnam.
They also defeated the French in Vietnam at Dien Bien Phu in a similar manner.

The Houthis are a hard nut to crack. Air power is likely not enough to stop them.
1. Can their supply lines be cut off instead?
2. Can their rocket storage facilities be found?

Time will tell if there is a way to deter them.

Also, any illegal Iranian shipments to the Houthis may have been harmed by the massive recent explosion at the port of Shahid Rajaee in southern Iran.

There is a bit of an aside here regarding Israel.
President Gamal Abdel Nasser’s Egypt was so tied down in the war in Yemen that it likely contributed to his defeat at the hands of Israel in the 1960s.

Iran is not tied down in Yemen, though, so it is not clear what will become of the Houthi threat.