Bill Clinton says the needs of many Haiti earthquake survivors are not being met.

The U.N. special envoy for Haiti is urging U.N. officials to provide better shelter and sanitation for hundreds of thousands living in temporary camps at risk from floods and landslides.

Clinton's press office says he asked for more tents, latrines and hurricane-proof dwellings during a Monday phone conference with U.N. officials. He also called for strengthening job and agricultural programs.

The U.N. says 520,000 people have received emergency shelter but even more still need help.

Humanitarian officials previously asked aid groups to stop ordering tents in favor of plastic tarps said to be better suited for the rainy season.