Hawaiʻi officials plan to crack down on illegal fireworks after they triggered an explosion that killed 3 people and injured dozens more on Oʻahu. A New Yearʻs celebration was marred by tragedy in Aliamanu on Oʻahu when a firework called a “cake” with 50 illegal aerial rockets within it tipped over and fired into a carport that set off more fireworks inside shortly after midnight on New Yearʻs Eve, according to Honolulu Police Chief Joe Logan.