There is a hazardous materials emergency in Crockett and Rodeo at the Nu Star facility.
The danger will be much less indoors. Go inside, and close all windows and doors. Turn off all heaters, air conditioners, and fans. Unless you are using your fireplace, close your fireplace dampers and vents. Cover any cracks around doors or windows with tape or damp towels. Stay off the phone unless you need to report a life-threatening emergency at your location. Remain sheltered indoors until you receive further official instructions. Stay off the phones and do not call 911 unless you have a life threatening emergency.
For more information, check media reports and official Twitter accounts for Con Fire, Contra Costa County Sheriff's Office PIO, CHP. Check https://cwsalerts.com for any Shelter in Place updates.