From the summary for Temporary Protected Status: Overview and Current Issues (RS20844, Mar. 29, 2019):
Provisions exist in the Immigration and Nationality Act (INA) to offer temporary protected status (TPS) and other forms of relief from removal under specified circumstances. The Secretary of Homeland Security has the discretion to designate a country for TPS for periods of 6 to 18 months and can extend these periods if the country continues to meet the conditions for designation. Congress has also provided TPS legislatively.