The U.S. Secret Service released news that their L.A. field office's communications site at Mt. Disappointment was severely damaged, with equipment lost. Excerpt from their official statement:
"The exact amount of loss and damages are still being assessed. Communications systems are still functioning using a back-up communications site. No essential loss of communications services to the Secret Service have resulted, and we continue to assess overall damage. To be completely accurate, the coverage from the back-up communications site is not as strong therefore some spotty coverage may result [in] portions of the Los Angeles area."