A hacker with a sense of fun hijacked Dallas's tornado sirens during a test, making them play the classic theme from SpongeBob SquarePants. Nobody knows who did this or why, but the internet loves it.

Sedgwick County operates 153 sirens across the county. Here’s what to know about the tones, when to take shelter and more. Getty Images Mahoning Matters Tornado season officially began this month, and ...