1 Killed After Fireworks Explode in Garage Setting House Fire

What began as preparations for a July Fourth celebration ended in tragedy Thursday when a powerful explosion tore through a quiet suburban neighborhood, killing one person and setting a home ablaze.

Just after noon, emergency crews rushed to the 2300 block of Calle Diamante in Simi Valley, a peaceful city northwest of Los Angeles, after reports of violent explosions shook the area. When they arrived, the home was already engulfed in flames.

“It sounded like a bomb,” said Thomas Kudlick, a neighbor who lives across the street. “I ran out and saw the garage had collapsed. Then—boom—more explosions. The whole thing just kept blowing up.”

Police quickly confirmed the source of the blast: fireworks stored inside the garage. Investigators believe the fireworks ignited suddenly and violently, triggering multiple explosions and setting off a fast-moving fire that tore through the attic and into the main structure of the house.

One person was killed in the blast, authorities confirmed. The identity of the victim has not yet been released pending notification of family.

The fire and subsequent investigation forced authorities to seal off the area for several hours as firefighters battled the flames and investigators combed through the smoldering wreckage.

“We urge everyone to stay away while crews continue their work,” the Simi Valley Police Department said in a statement Thursday evening. “This tragedy serves as a grim reminder of the dangers of illegal fireworks.”

The deadly incident comes just as California authorities remain locked in a massive investigation in the state’s northern region, where seven people remain missing following a fireworks warehouse explosion in Modesto earlier this week. That blast leveled part of an industrial block and rattled buildings miles away.

Between 2012 and 2023, California saw over 1,400 fireworks-related fires, according to state fire records. In 2022 alone, illegal fireworks caused $59 million in property damage nationwide, the National Fire Protection Association reported.

Officials in Ventura County are reminding residents that personal use of fireworks—even so-called ‘safe and sane’ types—is banned in many parts of Southern California, including Simi Valley.

“Every year, we warn people. And every year, someone thinks they’re the exception,” said Fire Marshal Ricardo Peña of the Ventura County Fire Department. “This wasn’t an accident—it was preventable.”

Neighbors say they’d seen suspicious activity at the house in recent days.

“I saw someone unloading boxes late at night. Thought maybe they were just party supplies,” Kudlick added. “I had no idea they were stockpiling fireworks.”

As investigators work to determine exactly how the explosion occurred and whether charges will be filed, residents across the state are being urged to leave the fireworks to the professionals.

“This is supposed to be a time of celebration,” Peña said. “But for one family in Simi Valley, it’s become a time of unimaginable loss.”