Firefighter, civilian treated for medical issues during grass fire south of Terrell, authorities say

A grass fire that officials said was caused by welding spread to about seven acres, leaving a firefighter with a heat-related emergency and a civilian with facial burns, authorities said.

The fire was reported just before 3 p.m. near County Road 275, south of Terrell, according to Kaufman County officials.

When firefighters arrived, the blaze had already spread across several acres and crossed property lines, with flames reaching about 20 feet and torching trees, fire officials said.

One firefighter suffered a heat-related emergency. CareFlite responded with two EMS units and a supervisor, with a helicopter placed on airborne standby, fire officials said. A civilian who had tried to fight the fire was found with facial burns. The firefighter and civilian were treated at the scene and released.

The Kaufman County Fire Marshal's Office said the fire was caused by welding on a fence without proper fire suppression equipment.

Multiple fire departments responded, and additional personnel and equipment were requested to help battle the fire.

The case remains open and under investigation.

CBS News Texas will provide updates as more information becomes available.