That's especially the case in Long Beach, where detectives recently seized about 5,000 pounds of fireworks.
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The person suspected of trying to sell the fireworks is now under arrest.
Not only are fireworks illegal in Long Beach, but officers say they also pose a fire risk and can be harmful to veterans with PTSD and dogs.
MORE: July 4th 2019 pet owner guide: Fireworks safety, picnic items to keep out of reach and more tips
Fourth of July pet safety tips
Officials in Orange County are also spreading the same message ahead of the holiday. They're asking the public to use extra caution even when using the "Safe and Sane" variety.
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RELATED: Orange County officials encourage fireworks safety this 4th of July
OC officials urge fireworks safety this 4th of July
Last year, the Orange County Fire Authority says they had 38 calls that required emergency room visits on the Fourth of July, related to fireworks. Officials want families to stick to pre-planned events.
To find one near you, check out our list of July 4th events around Southern California.