Eonline! is reporting that the residences of several celebrities, including Oprah Winfrey, Rob Lowe, Michael Douglas, Ellen DeGeneres, Kevin Costner and Jeff Bridges, are being threatened by a fast-growing wildfire that has broken out in Montecito, California.

The fire started around 6 p.m. Thursday evening and has spread across 2,500 acres. 100 residences have already been burned, and if the fire continues, 1,500 more homes could be at risk.