Amid threats of another wave of red toxic sludge in Hungary, workers are racing to build make-shift emergency dams.
Cracks have widened in the reservoir wall at the alumina plant that was the source of Monday’s deadly catastrophe.
There have been attempts to reinforce the wall but now officials say it seems to be beyond repair.
Some 1,000 nearby residents have been evacuated from their homes in case of a second wave of sludge.
Monday’s spill of a million cubic metres claimed seven lives and has been deemed the country’s worst ecological disaster ever.
The government is promising tough legal action if the owners of the site are found to have been negligent.