Aerial view of the toxic sludge flood covering fields, roads and canals. The toxic flood was caused by the rupture of a red sludge reservoir at an alumina plant in western Hungary and has affected seven towns near Ajkai, 100 miles (160 kilometers) southwest of Budapest. This sludge, to date responsible for the death of 7 people and over 120 injuries, is highly toxic and contains a mixture of heavy metals.