Chaudhry claimed that the Afghan government has no will to help stop smuggling and the illegal movement of people to Pakistan.
The statement cited corruption, lack of transparency and non-coordination with the ministry as reasons for the closure.
Afghanistan has been particularly hard hit by floods in the past few months, which experts are attributing to climate change.
The organization stated that currently 12.4 million people in Afghanistan are facing food insecurity.
Gaza's Civil Emergency Service said dozens were wounded in addition to the fatalities in the schools of Hassan Salama and Al-Nasser, which housed Palestinian displaced families