The bulk of the money will go towards temporary shelter, food, water, and other material aid. Provision is also made for psychosocial support, and for the eventual return and reintegration.
The intensification of violence has come a day after the indefinite postponement of United Nations sponsored peace talks planned for May 28.
The militants controlling downtown Benghazi are not allowing civilians to leave and the conditions are increasingly dire due to food shortages and lack of medical care, says HRW.
The situation appears to be improving thanks to intensive efforts, but the risk of transmission remains high due to limited access to shelter, toilets, water and essential medical care.