With high temperatures and gusty winds in the forecast, PG&E announced power shutoffs are “likely” in Northern California. The outages, which are expected on Monday and Tuesday, are a preemptive measure to prevent PG&E’s equipment from sparking wildfires.

The Pacific Gas & Electric Co. began shutting off electricity Monday in three of 11 counties threatened by high fire danger — the first of the deliberate outages were made in the Sacramento Valley but could grow across Northern California amid forecasts of “unseasonably hot” temperatures, high winds and dry conditions.

Possible planned power outages due to the current heat wave roasting Northern California were called off for customers in Contra Costa, Alameda and Sonoma counties and most of Napa County, PG&E officials said early Monday evening.