The storm is moving out of Mexico near El Paso, according to the National Weather Service's Weather Prediction Center. Because it's tracking so slowly, the system is expected to linger over parts of the state. A cold front moving in at the same time is raising concern about how much rain falls in a short window.

Gov. Greg Abbott told Texans on Monday to "take action" ahead of the incoming weather. He said he's activated additional state emergency response resources to get ahead of the storm before it arrives.

For anyone in the path of this system, the message is simple: don't wait until water is already rising. Storms that move this slowly tend to sit over one place for days instead of hours. That's the setup that turns creeks and low roads into flood zones fast, and it's why officials are already treating this as more than a routine rain event.

A hurricane's remnants tracking hundreds of miles inland to graze the Texas-New Mexico line is a reminder that tropical systems don't need a coastline to cause trouble.