https://phys.org/news/2018-05-lava-hawaii-volcano-ocean.html

Since the eruption began on May 3, Hawaii County has ordered about 2,000 people to evacuate from Leilani Estates and surrounding neighborhoods.

Hawaii officials have said they may need to evacuate a thousand more people if lava crosses key highways and isolates communities in the mostly rural part of the island where the Kilauea volcano is erupting.