At 7:12 on a Saturday morning, Colin Reeves woke to a sound he had never heard inside his own house before, a sharp alarm from his phone that left his heart hammering. He reached for the phone on the nightstand, his hand fumbling once, and the screen was already lit with a message in plain capital letters that told him everything and nothing at the same time: "ZONE FOUR: EXTREME FLOW DETECTED". The system had been upgraded only three weeks earlier. The installer had walked him through the new pressure sensors twice, explaining that they would alert on any rupture or any flow outside the scheduled watering times, and Colin had nodded along the way a man nods when he is buying peace of mind for a house he intends to keep. Now the alarm was doing exactly what it had been installed to do, and the fact that it was working did not make the sound any less alarming.
He was out of bed and halfway down the stairs before he had decided to move. His feet were bare on the old oak floors, and the house was still quiet, the rooms holding the cool air of the night. He pulled on jeans over his sleep shirt as he went, not bothering with shoes, and by the time he reached the back door he had the security application open. The app showed the side yard in the flat light of a camera looking down a narrow strip of lawn between his house and the wooden fence that separated his property from Dana Mercer's corner lot. The newest sprinkler head sat in Zone Four, near the middle of that side yard, and in the image it was not running. That was the first wrong thing. The second wrong thing was standing beside it.
Dana Mercer was walking through his side gate with a hammer in her right hand. Colin stopped with his hand on the back door and watched the small screen, because his mind needed a second to catch up with what his eyes were reporting. Dana was not supposed to be in his yard at all, let alone at seven in the morning with a tool in her hand. She glanced once toward his bedroom window, a quick, checking look, and then she crossed the lawn with a steady stride and stopped beside the newest sprinkler head. The head was not running. Nothing was leaking. Nothing was broken yet. She stood over it for a beat, the hammer hanging at her side, and then she raised it.
The first strike cracked the plastic housing. Colin heard it through the phone's small speaker as a flat, hard sound, and he saw the housing split along one side, a white line opening in the green plastic. The second strike drove the head sideways, bending it out of its socket so that it leaned at a wrong angle, its nozzle pointing at the fence instead of the lawn. The third strike split the pipe beneath it. Water erupted at once, not in a gentle fountain but in a hard rush, spray rising nearly six feet into the air and falling back across the lawn in a silver sheet. The sound changed on the recording from the small impacts of the hammer to a continuous rushing roar, and Colin could see the water hammering the grass flat, turning the soil around the sprinkler dark in seconds.
Dana stepped back to avoid getting wet. She did not look surprised. She did not reach for the shutoff valve at the irrigation control box, which sat in plain view near the side of the house, and she did not call out to him or knock on his door. Instead she lifted her phone and photographed the broken sprinkler from several angles, moving around it with care, crouching once to get the split pipe and the cracked housing in the same frame. Then she smiled, a small, satisfied smile that Colin saw clearly on the screen, and she placed the hammer inside a canvas gardening bag she had brought with her, and walked home through the gate as if she had just finished an ordinary errand.