Some tense moments for drivers in Houston.

This as emergency crews respond to a fatal wreck involving an 18-wheeler.

According to ABC affiliate KTRK, the accident happened around 7:30am on the northbound lanes of I-45 at the South Loop, shutting those lanes down..

A spokesperson from the Houston Fire Department says the driver of the big rig died from his injuries.

The cause of the accident is still under investigation.