DHADING, Nepal (AP) — Authorities in Nepal warned of possible fresh flooding on Sunday and urged residents in flood-affected districts to remain on high alert after water levels rose in the Bhotekoshi River.

Flood warning notices were sent to people’s phones early Sunday as rescue crews worked to clear a major highway connecting Kathmandu to one of the areas worst hit by Wednesday’s catastrophic floods, which killed at least 800 people and left more than 3,000 missing in Nepal and Tibet.