What is a Second In?

A 'Second In' refers to the second fire engine or firefighting unit to arrive on the scene of an emergency, typically a fire incident. The Second In crew usually supports the first arriving unit by performing tasks such as securing a secondary water supply, assisting with fire attack or search and rescue, and providing backup as needed. Their specific duties can vary depending on the nature and scale of the incident, as well as local protocols and standard operating procedures. The teamwork between the First In and Second In crews is crucial for effective and safe fireground operations.