Cruise ships have canceled stops on Hawaii's Big Island. Hotel rooms will sit vacant this summer despite price cuts.

And guest house owners and tour guides that depend on the 2 million visitors each year to Hawaii Volcanoes National Park are wondering how long their families will go without any income.

Tourism authorities say summer bookings for hotels on Hawaii's Big Island have fallen almost 50 percent since the Kilauea volcano began spewing lava and toxic gases on May 3.

The closure of the park, the state's top tourist destination, alone is costing the island $166 million, the National Park Service said on Monday.

The lost revenue rises to $222 million when some 2,000 jobs indirectly impacted by park tourists are included, according to a park service report.

Tourism is the Big Island's largest industry, and by far, biggest employer, providing more than 30 percent of private sector jobs in 2017, according to the Hawaii Visitors Bureau.

Erik Storm's EcoGuides business, which conducts tours of Hawaii Volcanoes National Park, ground to a halt a month ago when volcanic conditions made it too dangerous to visit lava areas.

"We have a family to support so we hope that the National Park will reopen again soon, otherwise this could have a serious impact on our life."