San Gabriel Valley cities struggle to get up and running in the wake of a powerful Santa Ana-fueled windstorm that downed trees and caused power outages. In Arcadia, damage to trees in the Los Angeles County Arboretum was extensive. Arcadia Mayor Gary Kovacic said the storm downed more than 500 trees and seven buildings had been red-tagged. Damage estimates were pegged at more than $1 million. Santa Anita Park reopened for simulcast wagering yesterday. Photos.