In the new and expanded edition of The Evolving Fireground: Research-Based Tactics, Deputy Chief P.J. Norwood and Captain Sean Gray discuss how fireground strategy and tactics have evolved in light of fire research conducted around the world. They discuss the fire tetrahedron and how fuel, heat, and air all affect a fire's growth or extinguishment. This text takes the lessons learned from the research as well as their general knowledge of the fireground to illustrate safer and more effective ways to operate on the fireground. This new edition emphasizes the need for improved firefighter training, equipment, health screening, and safety protocols to address evolving threats and prevent both traumatic and health-related line-of-duty deaths. This book is an important resource for anyone wanting to put new fire dynamics research to action.