When someone is in trouble and needs help, a rescue vehicle is a special car or truck that goes to help them. The vehicle is usually bright colors like red or yellow and has big sirens and flashing lights on the roof to let other drivers know that it's an emergency and that they need to get out of the way.
There are different kinds of rescue vehicles for different kinds of emergencies. Sometimes a big fire truck with a ladder comes to help when there's a fire. Other times an ambulance comes to help someone who is sick or hurt and needs to go to the hospital. And sometimes police cars or helicopters come to help when there's a dangerous situation.
Inside the rescue vehicle, there are special tools and equipment that help the people inside do their job. For example, firefighters have hoses and axes and breathing masks to help them put out fires and rescue people from burning buildings. Medical teams in ambulances have stretchers and medicine and special machines to help them monitor the patient and give them the best care possible.
Rescue vehicles are very important because they help people who are in trouble and need help. They have special people who are trained to handle different kinds of emergencies and who work together to get the job done. It's important to stay safe around rescue vehicles and to always listen to their sirens and flashing lights so that we can help them do their important job.