Erosion of Russian era graves is a concern because of history with epidemic, and tribal office has to collect and rebury remains.

At risk from surging storm waves and floods, Alaska's coastal villagers are dealing with the immediate consequences of climate change -- threats to their health, safety and even their ancestors' graves.

Noatak site experiencing thawing and subsidence.

This year was one of the warmest and wettest in recorded history, and permafrost thaw is causing the ground at the mass gravesite to sink.

In villages like Kongiganak, communities have stopped burying their dead because, as the permafrost melts, the oldest part of their cemetery is sinking.