So-called ‘tornado sirens’ are not always activated in response to tornadoes. Here’s everything you need to know.

South Tarrant County was under a tornado warning, and sirens sounded across Fort Worth and other cities because of severe storms. Damage ranges from downed trees and power lines to a collapsed warehouse building.

According to a hotel employee, there were 20 guests staying at the hotel at the time. They all made it out of the hotel safely and no injuries were reported. Inside some of the ro