From BBC:

Aid workers say fighting in Yemen has made it virtually impossible to ship humanitarian supplies to a key harbour when the country is at risk of famine.

The Red Sea port city of Hudaydah has been a site of fighting and airstrikes by the Saudi-led coalition resulting in damage. Also citing the possibility of not enough security for aid workers, the International Committee of the Red Cross has had to halt deliveries of humanitarian aid.

90% of Yemen’s food is imported.