From people I know at the lab:

JPL has been emergency personnel only since last night and will stay closed until Monday. Earlier today; spacecraft communication was shifted over to the Goldstone site in the Mojave, before the regular internet links to the lab went down.

I have not seen reports of any damage at the lab and there is the county fire department camp on-site.

Updates are to be posted at https://emergency.jpl.nasa.gov/ .

But I fear for the houses of JPL folks who live in Altadena.