Gov. Kathy Hochul on Sunday announced an immediate "burn ban" for all of Long Island and New York City, and for parts of the Hudson Valley. The ban prohibits igniting any outdoor fires to remove brush or debris, as well any uncontained campfires or open fires for cooking.

The wildfires that burned through more than 600 acres on Long Island probably originated from a backyard fire in Manorville, Suffolk County, police said.

The current "operating theory" is that the fires were sparked accidentally in a backyard near Sunrise Highway, authorities said on Monday.

Long Island brush fires were caused by a resident trying to make s’mores - The Westhampton Pines Fire burned approximately 600 acres before it was contained