Suisun City declared a state of emergency Saturday after malicious software breached its IT systems at about 5:45 a.m. Friday. 7 Suisun City features a waterfront, an historic downtown area, and many period neighborhoods. Despite the digital chaos, Suisun City officials said residents are not facing an immediate danger. Michael – stock.adobe.com7 Suisun City, in Solano County, is located about 45 miles from both San Francisco and Sacramento. Suisun City, in Solano County, is located about 45 miles from both San Francisco and Sacramento.