What significant technological change occurred in fire engines by the early 20th century?

In the early 20th century, the significant technological change observed in fire engines was the transition from hand-drawn to motorized engines. This marked a transformation in fire service capabilities, enabling fire departments to respond more quickly and efficiently to emergencies. Motorized engines, powered by internal combustion engines, provided greater speed, increased water capacity, and enhanced overall operational effectiveness compared to their hand-drawn predecessors, which relied on horses or manual labor for mobility.

The shift to motorized fire engines revolutionized the way fire services operated. Firefighters could reach incidents much faster, carry more equipment and supplies, and transport larger teams of personnel. This advancement ultimately contributed to improved fire suppression efforts and overall community safety.

Other options, while relevant to fire service advancements, did not represent the primary technological shift occurring at that time. The introduction of digital controls and automatic fire alarm systems came much later in development, while steam power in firefighting was largely phased out before the early 20th century.