PARIS: The UN and NGOs are warning of an imminent famine in the Gaza Strip — a designation based on strict criteria and scientific evidence.

But the difficulty of getting to the most affected areas in the Palestinian territory, besieged by Israel, means there are huge challenges in gathering the required data.

The internationally agreed definition for famine is outlined by the Integrated Food Security Phase Classification, or IPC, an initiative of 21 organizations and institutions including UN agencies and aid groups.

The IPC definition has three elements. Firstly, at least 20 percent of households must have an extreme lack of food and face starvation or destitution. Second, acute malnutrition in children under five exceeds 30 percent.

Almost a third of people in Gaza are not eating for days and malnutrition is surging.