The first hours look the same.
The power goes out. Maybe it's a Sunday and the grandkids are over.
At first it feels like any other outage. You find the flashlight. Someone jokes about the ice cream melting.
Then everything that needs power starts to fail. Your phone shows no signal. The Wi-Fi is gone. The fridge goes quiet.
And when you turn on the kitchen tap to fill a glass for the little one, it coughs, spits and slows to a trickle.
Most people never think about water. But water systems run on electricity. Pumps move it. Plants clean it. When the power fails, pressure can drop and the cleaning can stop.
That's why the April warning named water and wastewater systems as targets. Walder lists wastewater among the systems she calls "so vulnerable."
And it has already happened once.
On July 26 and 27, a coordinated cyberattack hit about 30 to 36 water systems across Minnesota. In Braham, malware shut down the controls at the water plant, and the water tower couldn't be filled for over an hour. Other cities switched to manual control.
According to a preliminary New York Times report, U.S. investigators believe Iranian hackers were probably behind it. President Trump has played that down.
Robert Pape called it a "brushback pitch." In baseball, that's a pitch thrown close to scare the batter, not to hit him.
Pape's point is that water and power systems now run on software, and software can be hacked. If the water isn't cleaned properly, he warns, bacteria gets in, and older people, young kids and babies are the most likely to get sick.
This time, nobody lost their drinking water. It was a warning shot.
You can see how fast it goes wrong. In 2021, more than 4.5 million people in Texas lost power in a winter storm. Walder lives there: