Residents of Kolontar evacuate from the threat of re-filling of waste

A second flood of toxic sludge from a storage reservoir at a Hungarian aluminium processing plant is "likely" after a new cracks appeared in a dyke, Prime Minister Viktor Orban said Saturday.

"The reservoir is so damaged that it is likely that it will give way for a second time," the prime minister said, according to AFP.

Residents of two Hungarian towns are being evacuated after prime minister Viktor Orban warned it was very likely the weakened wall of the red sludge reservoir will collapse.

Around 800 residents were moved from the town of Kolontar just before dawn and more than 5,000 are being evacuated from Devecser over fears that another spill could be imminent.

At least seven people died and more than 120 were injured when the walls of a reservoir at a metals plant gave way on Monday flooding several towns in western Hungary with 184 million gallons of toxic waste, Sky News reports.