Michigan regulators just pulled what they say was a massive cache of illegal fireworks and explosive materials off the streets, more than 17,000 pounds in all, after a multi-phase investigation that drew in Detroit’s bomb squad along with Garden City police and fire crews. Officials revealed the seizure as the state ramps up enforcement ahead of July Fourth, noting that the haul included professional-grade fireworks that carry a higher risk of fires and dangerous blasts.
What investigators found
According to investigators, the stash included roughly 12,000 pounds of overloaded fireworks devices that were falsely labeled as 1.4G consumer-grade products, plus about 5,000 pounds of federally regulated 1.3G display fireworks that are supposed to be handled only by licensed pyrotechnicians. Some of those display shells were reportedly as large as 12 inches across, underscoring how powerful they were, as reported by FOX 2 Detroit.
Officials warn the public
State Fire Marshal Tom Hughes did not mince words about the risks.
"Illegal fireworks and explosive materials can create serious safety hazards when they are improperly possessed, stored, transported or used," Hughes said.
LARA Director Marlon I. Brown added that the operation highlights how different agencies have to work together to head off fireworks-related disasters, saying the seizure shows the critical role public-safety partners play in keeping communities safe, per FOX 2 Detroit.
How display and consumer fireworks differ
Federal rules draw a bright line between consumer fireworks, classified as Division 1.4G, and larger professional display shells, classified as Division 1.3G. Once a product falls into the 1.3G category, it triggers stricter licensing, storage, and transportation requirements overseen by federal regulators.
The U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration notes that 1.3G fireworks need a formal explosives classification and must be handled differently from 1.4G consumer fireworks. That is exactly why mislabeled products can be so dangerous for the public, according to PHMSA.
How to report suspicious sales and why it matters
The Department of Licensing and Regulatory Affairs operates a 24/7 complaint line for suspected illegal retail fireworks sales at 517-388-6715 and urges residents not to touch questionable shipments. If there appears to be an immediate threat, officials say people should call 9-1-1 instead, according to Michigan LARA.
The state’s Bureau of Fire Services says its Fireworks Enforcement Unit seized more than 1,000 cases of illegal fireworks in 2025 and regularly teams up with federal agencies to dispose of bulk and overloaded products, per the Bureau of Fire Services. Officials also point to cases where high-powered fireworks surfaced just before acts of violence, including a March incident in metro Detroit in which a suspect allegedly bought about $2,250 worth of fireworks days ahead of an attack, as reported by CBS Detroit.
LARA and local public-safety agencies say the recent seizure removed a significant threat and that stepped-up enforcement will continue through the holiday season. For now, officials are urging Michiganders to let licensed professionals handle the big displays and to report any suspected illegal fireworks sales to state or local authorities.
