Kilauea, one of Hawaii’s most active volcanos, erupted on Thursday, spewing lava and steam into a nearby residential neighborhood and prompting officials to issue a mandatory evacuation notice.

The American Red Cross opened two shelters to accommodate evacuees from the subdivisions of Leilani Estates and Lanipuna Gardens, located in the Puna district on the Big Island. It remains unclear how many people were impacted by Thursday’s evacuation order but The Associated Press, citing 2010 census numbers, said Leilani Estates has a population of about 1,500.