The Brief Harris County officials say injuries involving e-bikes, e-scooters and electric motorcycles have increased dramatically. As students head back to school, Harris County medical experts and first responders are warning parents about a sharp increase in injuries involving e-bikes, e-scooters and electric motorcycles. What the numbers showLocal perspective:Harris County ESD 11 Mobile Healthcare and Harris County Public Health recently reviewed local injury data involving e-bikes, e-scooters and electric motorcycles. Harris County ESD 11 described that as a 17,000% increase over six years . Dr. Kovar said the faster a device is traveling, the more severe a rider’s injuries can become.