When you hear a loud siren and see flashing lights, it means a fire truck is coming to help! Fire trucks are big, red vehicles that carry firefighters to places where there is a fire or someone needs help.
The siren is that loud noise you hear. It's like the fire truck is saying, 'Move out of the way, please!' so that cars and people can give it space to go fast and do its important job.
The flashing lights are bright and colorful! They help everyone see the fire truck, especially when it's dark, so people know to let it pass quickly.
Firefighters are brave men and women who help keep us safe. When you see a fire truck with its siren and lights on, it means they are going to help someone in need!