Wells Fargo Securities estimates that the vape industry will generate $3.5 billion in revenue in 2015. Though both sectors of the industry are growing, personal vaporizers have become more popular than e-cigarettes and account for more sales.

Expected market in 2015: $3.5 billion

Expected market in 2015: $3.5 billion

Expected market in 2015: $3.5 billion

Expected market in 2015: $3.5 billion

Sources: Yelp, Wells Fargo Securities, California Poison Control System, American Assn. of Poison Control Center, Times research. Note: Each red spot on the animated map represents a new vape business being added to Yelp in SoCal either by the business itself or by a consumer. Every year depicted in the animation shows cumulative vape shop growth over the past ten years. Only the vape shops that are currently listed as open on Yelp are represented in the animation. The date that a business is added to Yelp isn't always synonymous with the exact businesses opening date. Data provided by Yelp. Graphics reporting by Whip Villareal and Raoul Ranoa.

Raoul Ranoa @latimesgraphics