Lena had sat up before the dispatcher finished speaking.

“Which station?”

“Gate Seven.”

She swung her feet to the floor.

“Tell the incident commander I’ll be there in forty minutes. Tell whoever is operating that gate not to make any changes until I can confirm what’s happening. And get me an actual water level from a person standing there. Not a screen.”

She dressed in the dim kitchen of her apartment outside the state capital. The rain made the windows look like sheets of hammered silver. Her teenage daughter, Nia, slept upstairs. On the refrigerator hung a crooked photograph of the two of them at a science fair, Nia grinning behind a homemade model of a suspension bridge.

Lena wrote a note beneath it: *Emergency call. I’m going to Briar Crossing. Grandma is okay as far as I know. Love you. Mom.*

Then she stopped and looked at the last sentence.

Her mother, Loretta Mercer, lived in Willow Court, an older apartment community just below the west drainage channel. Lena had spent years telling Loretta that the building was a bad place to stay during heavy storms. Loretta had spent those same years informing her that she had raised three children, survived two recessions, and did not require a daughter with an engineering degree to tell her how to listen to the weather.

Lena called. No answer.

She called again while putting on her boots. No answer.

“She’s asleep,” she told herself.

But she could see Willow Court on the drainage map in her mind as clearly as if someone had drawn it across the kitchen floor.

Briar Crossing was a mill town with a broad river, a beautiful old stone bridge, and a habit of pretending the river was merely scenery. Decades earlier, factories had lined the northern bank. When the factories closed, developers discovered that the waterfront looked appealing in brochures. The city built walking paths and planted ornamental grasses. The county approved new luxury residences at Harbor Point. There were ribbon cuttings, speeches, and a glossy sign that declared the project a model of responsible waterfront renewal.

Lena had attended one of those meetings in her professional capacity.

She remembered walking out before the refreshments were served.

On the drive west, rain hammered the roof of her state-issued SUV. The navigation display kept offering a shortcut through lower streets she knew would soon be impassable. She stayed on the ridge road. At 3:51, Frank Delgado, the city’s waterworks foreman, called her.

“You headed here?”

“Ten minutes out. What does your staff gauge show?”

Frank was silent for a moment.

“I don’t like the answer.”

“That makes two of us.”

“The screen says six feet, two inches. The painted post says seven feet, one. There’s no way they should be that far apart.”