The island has been suffering the effects of a volcanic eruption that began in September last year and intensified earlier this month.
The government decided at the weekend everyone on the island would have to move to neighbouring Maewo.
But the Ambaeans are reportedly reluctant to go there and instead want to be moved to Santo.
In the meantime the Red Cross' Dickinson Tevi said the charity had been continuing to give aid to the many who have been displaced.
