Fire hydrants are essential devices used by firefighters to access water quickly during emergencies. They are typically found on streets and are connected to the water supply system. When a fire occurs, firefighters can open a hydrant to obtain the necessary water to extinguish the flames. These structures come in various colors and designs, often indicating the water flow rate and pressure. Fire hydrants are usually made of durable materials like cast iron and are designed to withstand harsh weather conditions. Regular maintenance ensures they function properly when needed, helping to protect lives and property from fire damage.