https://phys.org/news/2018-07-hawaii-businesses-lava-viewing-site.html

The risks posed by the volcano came into sharp focus this week when lava flowing into the ocean triggered an explosion that sent a hot rock the size of a basketball crashing through a tour boat's roof. One woman broke her leg, while nearly two dozen others suffered minor burns and scrapes.

Diane Ley, Hawaii County's director of research and development, said she's been working on setting up a lava viewing site for nearly two months, consulting with federal scientists and the county's civil defense administrator. The injuries from the tour boat only validate the county's caution, she said.