David Cuerpo from Seattle Fire says the fire started when one of the LimeBike battery packs ignited and caused other packs to catch fire. The sprinkler system activated and contained the fire within the room. The Vault Response Team was activated when the crews found high voltage signage; water from sprinklers mixed with battery acid can conduct electricity and pose a risk to firefighters. Cuerpo says they requested Seattle City Light to de-energize the building while crews shut off the sprinkler system, allowing the vault team to use dry chemical extinguishers onto the fire. When the fire was put out, the batteries were removed to a safe outdoor area in case they reignited.