Your water main is usually in the basement, crawl space, or near the front of your house, close to the street. It looks like a big metal wheel, a lever, or sometimes a little knob sticking out of the floor.
Go find it right now—not during a crisis. Poke around your utility room, behind the water heater, or near the garage. If you live in a warmer climate, check the outside wall or a covered box near the sidewalk.
Don’t worry if it’s rusty or stubborn—that’s totally normal. Give it a friendly wave and make a mental note. You’re already winning.