More than 40 lawsuits have been filed against Southern California Edison, as law firms launch their own investigations into the cause of the Eaton fire.

Edison International’s utility said it is looking at whether a decommissioned power line started the Eaton wildfire as part of a probe into the cause of the blaze that razed more than 9,000 structures near Los Angeles.

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.