That is population growth due to births. Net migration is negative and has been so for a quarter of a century:
Public Policy Institute of California:
Much has been made of the California exodus to other states, and rightly so. This migration, over the decades, has the power to reshape the state. From 2010 through 2022 about 8.5 million people moved from California to other states, while only 6.3 million people moved to California from other parts of the country, according to the American Community Survey. The state has lost residents to other states every year since 2000, according to Department of Finance estimates.
As for an expert opinion on climate-challenged real estate, here is a take from Daryl Fairweather, behavioral economist and the chief economist of Redfin (also a big boardgame nerd if the pile of Eurogames behind her in every interview is an indicator):
Stranger