California utility giant Pacific Gas & Electric Co. and seven smaller peers filed Feb. 6 to the state Public Utilities Commission their mandated 2019 plans for boosted infrastructure, technology and operations upgrades to respond to and prevent wildfires that have already devastated big parts of their service areas. PG&E in particular is under scrutiny for its role in 2017 and 2018 fires, with potential liability leading to the publicly-traded firm's Jan. 29 bankruptcy filing. Its mitigation plan could cost between $1.7 billion and $2.3 billion to implement, said the utility.