No, they can be any color.
Red
Because it's pretty.
Most modern British fire engines are predominantly red, as are the fire engines of most countries. Some types of fire-fighting vehicles are yellow however, especially those used in airports. The link below shows this visually.
The Fire Engines was created in 1980.
Trevor Whitehead has written: 'Fire Engines' 'Fire engines' -- subject(s): Fire engines, History
fire engines have ladders, water hoses, and people
The answer is FIRE
The number of fire engines dispatched to a fire can vary depending on the severity of the fire, the size of the area affected, and the resources available. A typical response may involve multiple fire engines along with other emergency vehicles and personnel.
Fire engine red is a vivid shade of red that typically consists of a bright, bold hue often described as a pure red with a slight orange tint. This color is created by combining red with a touch of yellow to enhance its brightness and visibility. The result is a striking color that is easily noticeable, making it ideal for emergency vehicles like fire engines.
Fire Engines at Work - 1903 was released on: USA: 1903
no
Yes, both fire and Paramedic units run diesel engines. Others are powered by gasoline or even compressed gas.