True or False: Temperatures in most structure fires typically exceed 1900 degrees Fahrenheit for long durations.

In most structure fires, temperatures typically do not exceed 1900 degrees Fahrenheit for extended durations. While initial flashover conditions can reach such high temperatures, these extremes are usually not sustained. The thermal dynamics of a fire, influenced by factors like ventilation, fuel types, and the structure's design, result in varying temperatures throughout the event.

Most structure fires average between 1000 to 1500 degrees Fahrenheit during the main burning phase. Temperatures may spike momentarily to around 1900 degrees Fahrenheit, especially when combustible materials ignite and oxygen supply allows for intense burning. However, once the available fuels begin to diminish or ventilation changes, the temperature often decreases significantly. Therefore, the statement that temperatures in most structure fires exceed 1900 degrees Fahrenheit for long durations is not accurate, making the answer false.