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Official: Nepal monitors two lakes; flood risk will remain until the lakes are fully drained.

An official with Nepal's Disaster?Management Authority confirmed that Nepal monitors two lakes a few miles upstream from the flood zone, where hundreds of people died on Wednesday.

The official said that flood risks would continue until both lakes are completely drained. One of the lakes started overflowing Friday.

Satellite images showed two lakes near the site of a glacier slide that pushed debris, rock, ice and mud into rivers on Wednesday. This caused flood waves which destroyed houses and destroyed bridges.

A Chinese rescue team captured aerial footage of the formation of 'one of the two Lakes on Thursday.

On Thursday, footage showed brown water in large quantities accumulating within a basin. According to satellite images, the water had drained from this lake by Friday.

Images also showed that a second lake was growing upstream, and that its surface area was larger than the first one. There were no visible outlets as of Friday morning, which means that water pressure is still building.

The Nepalese official stated that the Nepalese authorities rely on satellite imagery for monitoring the conditions. However, this is only possible because of the limited availability of images.

He said that Nepal is planning to install 'cameras and sensors downstream, including near a border town called Timure. They are also evaluating helicopter deployment options. (Reporting and editing by Rick Noack; Sarita Chaganti, George Sargent)

(source: Reuters)