We must supply clothing and food to the disaster victims.

Literal

Disaster-victims [to-に] clothing-and-food [object-を] supply [must-なければならない].

被災者 (ひさいしゃ) means 'disaster victim.' 衣食 (いしょく) means 'clothing and food' — a two-kanji compound covering basic necessities. 供給する means 'to supply.'