The Oakland firestorm of 1991 was a large suburban wildland-urban interface conflagration that occurred on the hillsides of northern Oakland, California, and southeastern Berkeley on October 20, 1991. The official name of this incident by Cal Fire is the Tunnel fire. However, it is also commonly referred to as Oakland hills firestorm or the East Bay Hills Fire. The fire ultimately killed 25 people and injured 150 others. The 1,520 acres (620 ha) destroyed, included 2,843 single-family dwellings and 437 apartment and condominium units. The economic loss has been estimated at $1.5 billion.