A dangerous TikTok trend is to blame for a growing number of Chromebook fires in numerous schools, causing evacuations in some cases. What is the trend exactly and what causes the Chromebooks to spark? Let's Get the Facts.What is the trend and how does it start a fire? Students are using items like lead, paper clips and push pins to jam the electric ports of their Chromebooks.The trend not only damages school-issued laptops but can also start fires."Any sort of lithium-ion battery fire is going to release, it's extremely dangerous. And it releases toxic gases, and it happens very quickly once that happens. And so from a safety perspective in the school, that's my biggest concern," said New Hampshire Fire Marshal Sean Toomey.Toomey said the so-called prank can pose serious health risks, even if there are no visible flames."A laptop will start smoking a little bit, and they don't see it as this big raging fire, but that the gases associated with those batteries are extremely dangerous," he said.Chief John Olivieri of Belleville Fire Department in New Jersey also warned that Chromebooks' lithium batteries can reignite."Most people don't know that," he said. "So they'll bring it back into the house or we'll put it away, think it's OK, and then hours later we'll have a problem."How far-reaching has the trend become? At Cooperative Middle School in Stratham, New Hampshire, administrators sent an email to parents that reported at least 15 Chromebook fire incidents.Incidents have also been reported in New Jersey, Pennsylvania, California and Connecticut, just to name a few.How are students being impacted?Students at several districts where Chromebook fires have occurred have been evacuated from their classrooms or school buildings after fire alarms were triggered.A classroom was evacuated at Wilson C. Riles Middle School in Roseville, California, due to a Chromebook fire. Student Tristan Peeples, 12, didn't know what was happening at first."I was two rooms away from the room with the challenge. I heard screaming," he said.He and his sister learned later that a classmate tried the TikTok Chromebook challenge."I heard that people in my school were going around and putting lead into their laptops," said Serena Peeples. "I was like, 'OK, well, that's stupid.'" As a precaution, the teacher used the fire extinguisher and evacuated the classroom."This is just going too far, putting the safety of others and themself at risk," said Serena Peeples. "It's just bad." Tristan Peeples has a message for his classmates."You're dummies and doing stuff that is not safe," he said.How is TikTok responding?TikTok has taken action and blocked the search option for Chromebook fires and other similar searches.Instead, there is a safety warning and resources for users.What warnings should parents share with their children? While some students may see the challenge as a joke, Toomey said they need to understand the hazard it causes."We got to get that message out, to really prevent these incidences, especially in a school where there's a lot of people and there's a high probability of injury," he said.At a school in Belleville, New Jersey, WABC reported that a 15-year-old student put lead from a mechanical pencil into a Chromebook port and was charged with third-degree arson and criminal mischief.Police in Plainville, Connecticut, also charged a juvenile for a similar incident, WFSB reported.Plainville police said the student stuck scissors in the Chromebook's USB port, was sent to the hospital for smoke inhalation and now faces charges in juvenile court.In addition to the possibility of disciplinary action and criminal charges, some school districts are requiring students caught participating in the challenge to pay for a replacement."We don't want to put students at risk," said Chief Mark Minichini of Belleville Police Department. "We don't want to put our first responders at risk responding to a scene that they really shouldn't have to. So the message is, parents, please watch your kids. They're serious implications for doing something wrong like this."CNN contributed to this report.