A new U.N.-led report says the damage from Myanmar’s Cyclone Nargis in May is estimated to be $4 billion.

The report released Monday says this includes $1.7 billion in damage to assets and $2.3 billion from loss of income of the victims. Nargis devastated much of the region south of Yangon, leaving at least 85,000 people dead and about 50,000 missing.

The report, prepared by the U.N., the Association of Southeast Asian Nations and the Myanmar government, is the first comprehensive assessment of the damage caused by the cyclone in May.

ASEAN secretary-general Surin Pitsuwan said the survivors need at least $1 billion over the next three years so that “we can help them recover back on their feet as soon as possible.”