California utilities plan to continue shutting off power to customers during dry and windy conditions to prevent sparking deadly wildfires, but they aim to make outages more targeted to avoid widespread blackouts, according to plans filed with the state.

Plans by the state’s three largest investor-owned utilities said wildfire mitigation plans would build on efforts made last year to reduce the risk their equipment would cause deadly infernos.

Cyberattacks increasingly target and succeed inside energy and utility companies’ IT networks, rather than their critical infrastructure, according to a new report from cybersecurity firm Vectra.

In the past, the energy and utility industry’s cyber efforts have focused on preventing disruption of power availability via industrial control networks.

But the Department of Homeland Security issued a technical alert in March warning the industry of a “multi-stage intrusion campaign” originating in Russia targeting IT networks in the U.S. energy sector.