"The United States Department of Homeland Security's March 28 guidance on essential critical infrastructure lists as ""essential"" the construction of residential/shelter facilities and services (see ""essential services""), energy-related facilities, communications, and information technology, public works including the construction of critical or strategic infrastructure and infrastructure that is temporarily required to support COVID-19 response, is for certain other types of community- or government-based operations or is otherwise critical, strategic, or essential."