What kind of risk is it when the department of homeland security alerts the nation of possible attack by terrorists?

When the Department of Homeland Security alerts the nation of a possible terrorist attack, it represents a heightened level of security risk, specifically categorized as a threat risk. This type of risk involves the potential for harm or damage to individuals, property, and national security due to terrorist activities. It necessitates increased vigilance and preparedness measures to mitigate the potential impact of such threats.