In June of last year, I addressed the question of when a gubernatorially state of emergency ends. Government Code Section 8629 requires the Governor to proclaim a termination of a state of emergency "at the earliest possible date that conditions warrant". However, the courts appear to be reluctant to become involved.
Two members of California's Assembly have introduced a bill that would terminate a state of emergency 60 days after the Governor’s proclamation unless the Legislature extends it by a concurrent resolution. The bill, AB 69, would further prohibit the legislature from extending the state of emergency by more than 60 days. It is unclear whether the Governor could simply declare a new emergency based on the same exigencies.