Workers at the Ningnan Tunnel, currently under construction on the Yanjiang Expressway in Sichuan, China, had to make a rapid escape after a sudden flood struck the site on Tuesday. The flash flood swept through the tunnel, washing away construction materials and creating hazardous conditions for those on site.

Authorities have reported no casualties so far, and all workers are believed to have evacuated safely. The flood occurred during ongoing construction, underscoring the risks associated with large-scale infrastructure projects in regions prone to heavy rainfall and sudden water surges.

Footage from the site shows torrents of water rushing through the tunnel, displacing equipment and debris. Coverage within China has been limited, but officials are reportedly assessing the damage and planning measures to prevent similar incidents in the future.

The Ningnan Tunnel, part of the Yanjiang Expressway, is a critical infrastructure project, and construction teams are expected to take extra precautions as work continues amid challenging weather conditions. Safety protocols for workers and emergency preparedness remain a top priority following the unexpected flood.