Yemen's Houthi rebels launched their most geographically ambitious attack yet on Saudi Arabia over the weekend, firing a barrage of ballistic missiles, cruise missiles, and drones at targets stretching from the southern border to the capital Riyadh and into Mecca province. Saudi air defences intercepted at least 10 ballistic missiles along with cruise missiles and drones, but shrapnel from two interceptions fell across Jeddah, Taif, Rabigh, and Wadi Al-Mughammas — all in the province that houses Islam's holiest sites. The GCC Secretary-General Jasem Mohamed AlBudaiwi called the strikes "a grave violation of the sanctity of the Holy Sites and a provocation to the sentiments of Muslims worldwide." The Houthis deny targeting holy sites but have explicitly warned that Riyadh's King Khalid International Airport remains a military target, telling airlines, employees, and travellers to stay away. Houthi spokesman Yahya Saree announced seven operations targeting Saudi oil facilities and military bases. The air campaign is only one front. On the ground, Yemen's internationally recognised government launched "Operation Dawn of Yemen" on October 5 to retake territories lost after the Houthis captured the western coast including Mocha in a surprise September offensive. Yemeni armed forces reported 736 strikes on Houthi positions in just 24 hours, claiming 307 combatants "neutralised" and 68 military vehicles destroyed. The fighting followed the Houthis' September capture of Yemen's western coast after government forces attacked Sanaa International Airport to prevent a Houthi delegation arriving from Tehran. The humanitarian toll is staggering and worsening. The Rasd Organization for Rights and Freedoms warned that the Houthi siege of Taiz, imposed since October 4, has left 1,110 kidney failure patients facing shortages of dialysis supplies, with the city requiring roughly 120 dialysis sessions daily. Another 192 patients in intensive care and 154 children in incubators face the same supply crisis. Riyadh has partially reopened King Khalid International Airport — Terminal 2 for international flights, Terminal 1 for domestic — after suspending all operations following an October 10 strike that killed 13 people and wounded hundreds. The Houthis' explicit threat to continue targeting the airport makes this reopening a calculated risk rather than a return to normalcy. The escalation cycle is now self-reinforcing. Saudi interceptions near Mecca generate maximum religious and diplomatic outrage, which the Houthis leverage for domestic and regional legitimacy. Saudi and government forces respond with massive ground offensives, which generate humanitarian crises that further entrench Houthi control. Iran's role — visible in the Tehran-routed delegation that triggered the airport strike — adds a geopolitical accelerant that no local ceasefire mechanism can contain. Nothing about this trajectory creates new capacity for anyone. Saudi Arabia spends billions defending airspace it cannot fully secure. The Houthis burn military resources on provocation strikes while besieging their own population. Yemen's government retakes territory at devastating human cost. The only outputs are rubble, refugee flows, and a humanitarian catastrophe deepening by the day.