Officials said a well unexpectedly went offline and crews are working to make repairs.
The Vegas Chamber is leading the Hawaii Business Exchange Summit at the Sheraton Waikiki Beach Resort from Monday through Wednesday.
New additions this year include a lighted tunnel, illuminated trees, a train for keiki rides and festive displays along Alapaʻi and Beretania streets.
The fire was declared under control just after 5 p.m. No evacuations were needed and no structures were threatened.
The suspect, identified as VM Singeo, has been charged with second-degree assault.