The Highland Fire Department resumed testing their tornado sirens in April after a tornado tore through town in March, but whether it had been prior to that storm is doubtful.

Here is what Texans should know about the sound they hear during storms. What is an outdoor siren? Outdoor Warning Sirens are commonly referred to as "tornado sirens," but this term is misleading.

The outdoor warning siren, which is most commonly called a "tornado siren," at County Road 1 and County Road 5 stopped sounding after a devastating storm hit the area at the end of March.