More than 42,000 people have been affected by catastrophic flooding caused by the destruction of the Kakhovka dam.
Thousands have been evacuated from the Ukrainian-controlled part of the flood zone, while locals in Russian-controlled towns say aid volunteers were denied access as the waters rose.
Ukraine expects flood waters to peak in the coming hours, and remain high for the next 10 days.
Damian Rance from UNICEF spoke to Corin Dann.