Hawaii Gov. Josh Green on Monday proposed a range of new penalties to crack down on those who flout the state's fireworks laws, nearly two weeks after a fireworks explosion at a Honolulu home on New Year's Eve killed four people and injured about 20 others.

An explosion in Honolulu caused by illegal aerial fireworks shooting into a crate with more fireworks killed three and critically injured 20, police said.

The measure would categorize less than 25 pounds as a low-level offense, compared to the current weight increments, which have been hard to prove in court. The legislation would also increase the penalties for those who seriously injure or kill someone while using illegal fireworks.