Nearly 50,000 Yemeni civilians flee as Houthis advance along Red Sea coast

Global struggle for control of Bab al-Mandab strait threatens to turn Yemen's on-off conflict into a forever war

• Violence erupts in Yemen again: why it matters globally and how it is linked to the US-Iran war

Nearly 50,000 people have fled a sudden advance by Houthi forces in western Yemen, with entire villages emptied and families trapped near frontline fighting with depleting food supplies, according to aid workers.

Civilians in the Middle East's poorest country have found themselves victims of a global struggle for control over one of the most important shipping routes in the world, which threatens to turn Yemen's on-off conflict into a forever war.