Vanuatu's Geohazards Department raised the official alert threat from level three to four as an eruption on Ambae island continues to intensify. The alert levels range from 0 to 5 - level five is a very large eruption.
The National Disaster Management Office along with a team from the Geohazards department left early Sunday morning for Ambae.
On Saturday, authorities were preparing to evacuate as many as 5,000 people from one side of the island to the other as the volcano belches ash across much of the island.