[Update: The governor criticized the C.D.C. over delays in testing.]

ALBANY, N.Y. — Gov. Andrew M. Cuomo declared a state of emergency on Saturday as the number of coronavirus cases in New York rose to 89, which include a Queens driver who worked for Uber and two unexplained positive tests of patients 200 miles to the north.

Moving on multiple fronts to curb the spread of the virus, Mr. Cuomo said the state of emergency would allow New York’s government to respond faster by lifting regulations.

The governor’s announcement came as concerns about the outbreak grew in New York City, which has 12 confirmed cases, up from six that were disclosed as of Friday. The epicenter in New York State continues to be just north of the city, in Westchester County, where there are 70 cases in total.

These cases were mostly, if not all, related to a cluster in Westchester that first came to the authorities’ attention after a New Rochelle resident, a 50-year-old lawyer, was confirmed as New York’s second coronavirus patient.