Nearly 200,000 people were ordered to evacuate their homes and two million were without power Sunday as wildfires, fanned by howling winds, ripped through northern California, prompting Gov. Gavin Newsom to declare a statewide emergency.

Horrifying video footage and photos of the blazes circulated on social media Sunday as environmentalists said the fires are one of the devastating consequences of the human-caused climate crisis.

“The forces we’ve unleashed are beyond terrifying,” tweeted 350.org founder Bill McKibben in response to a photo showing a fire that broke out in the city of Vallejo around the Carquinez Bridge, shrouding it in smoke and briefly shutting down traffic.

Responding to the same photo, environmentalist and author Naomi Klein tweeted, “My lord.”