A federal search warrant is being served at the Garden Grove aerospace facility where a compromised tank carrying a toxic chemical forced evacuations.

The federal holiday, which falls on September 1 this year, means government offices and banks will be closed.

Massive fires continue burning after igniting in the foothills of Pacific Palisades, and Altadena, forcing thousands to evacuate amid a life-threatening and destructive windstorm slamming Southern California.