New regulatory filings shows power line surges, malfunctions during high winds, including at a transmission tower near where Hurst blaze began.

The utility company said its equipment may have caused the fire but that an investigation is continuing and that they are cooperating with authorities.

A California utility said Thursday that its equipment likely sparked a wildfire in Los Angeles that broke out the same day as two massive blazes in the area killed at least 29 people and destroyed thousands of homes.