Yemeni government forces said they struck Houthi fighters and supply lines near the Bab al-Mandeb Strait and in al-Bayda governorate as fighting intensified across several fronts.
Government forces also reported shooting down a Houthi reconnaissance drone in Taiz, while Saudi-led coalition warplanes struck Hayfan district following recent Houthi advances in western Yemen.
The escalating hostilities have driven a sharp rise in casualties and displacement across the country.
Government forces said the drone was downed on the al-Kadha front in southwestern Taiz, where heavy fighting continued as Houthi forces sought additional territory from Saudi-backed troops.
Earlier, government forces said they had recaptured several front-line positions west and south of Taiz city.
Houthi-run al-Masirah television separately reported Saudi-led coalition air strikes on Hayfan district in Taiz province.
The raids followed Houthi advances across parts of western Yemen, including areas along the Red Sea coast and near Bab al-Mandeb.
Jason Campbell, a senior fellow at the Middle East Institute, told Al Jazeera that the fronts remained characterized by daily tactical developments rather than a broader strategic shift.
He said Houthi forces had achieved tactical successes but could become overextended and subsequently lose territory.
The World Health Organization said fighting on multiple fronts had resulted in 674 deaths and 2,998 injuries since last month.
Between September 13 and 18 alone, it recorded 164 deaths and 516 injuries.
Displacement figures also continued to rise.
The International Organization for Migration reported 129,438 displaced people across seven governorates, including an increase of 11,352 between September 18 and 21.
Yemen’s Executive Unit for IDPs Camp Management placed the number at 158,000, saying about 23,550 families had fled homes across eight governorates.
Houthi leader Abdel-Malik al-Houthi said conflict with the United States would persist while Washington sought what he called dominance over Yemen.
He also said Washington was considering joint escalation with Saudi Arabia, as diplomatic and military tensions surrounding the conflict continued.