Sudan floods: UN warns of a humanitarian crisis

The United Nations has warned that the humanitarian situation in Sudan is worsening with further heavy rain and flooding expected in the coming days.

The government has already declared a state of emergency, and the UN says the supplies needed to respond to the crisis are running out.

Weeks of torrential downpours have led to flooding in all but one of Sudan's 18 states.

More than half a million people have already been affected and thousands have been displaced.

Torrential rains are also causing flooding across the Sahel region of Africa.