Residents of France know that they can call for help by dialling 18 for les sapeurs-pompiers, 15 for le Samu (service d'aide médicale urgente) and 17 for the police. The pompiers are called for help with fires, road accidents, and emergencies, including medical ones.
The Samu is the national ambulance service for providing rapid on-site acute medical care. Calls to both are free. Mostly just French is spoken, but this varies. Their respective call centres will know the caller's location either from their land-line number or from their mobile's GPS.