The death toll of Sri Lanka's recent floods and landslides is set to rise as many areas remain unreachable due to continuous rain, collapsed roads and unstable terrain.

The death toll from devastating floods and mudslides in Sri Lanka has exceeded 330 people, as the country grapples with one of its worst weather disasters in years. More than 200 are missing, and some 20,000 homes have been destroyed, sending 108,000 people to state-run temporary shelters, the Disaster Management Centre reported.

Hundreds more are missing following flooding and landslides in the past week, which killed at least 502 people in Indonesia, 334 in Sri Lanka and 170 in Thailand, authorities said.

Over 800 people remain missing after devastating floods killed over 1,000 people last week in Indonesia, Sri Lanka and Thailand

Severe flooding that ravaged communities across Sri Lanka was visible from space, as seen in satellite imagery released by a US-based research institute.Imagery posted by the Cooperative Institute for Research in the Atmosphere at Colorado State University shows the difference in terrain between November 2 and November 30 after the flooding hit.

Officials in Indonesia and Sri Lanka battled Wednesday to reach survivors of deadly flooding in remote, cut-off regions as the toll in the disaster that hit four countries topped 1,300.In Indonesia, there is growing frustration among survivors of catastrophic flooding and landslides over the pace of the rescue effort and aid delivery.

Hundreds more were still missing and millions have been displaced in the rain-drenched region, with Sri Lanka and Indonesia hit particularly hard.

Nepal has extended an economic aid of USD 200,000 for relief and rescue operations in flood-hit Sri Lanka, underlining that it stands firmly with the island nation in this difficult time.