Authorities have closed all traffic lanes between Wongwian Yai and Ban Khaek intersections after water seeped into a Purple Line tunnel, causing road subsidence and cracks, while DDPM rescue and pumping units stand by.

A follow-up inspection at the southern Purple Line tunnel site near Wongwian Yai found a further 20cm road-surface subsidence, slight building tilting and possible new cracks, though officials say evacuation is not yet required.