Floods and droughts are human-activated problems.

Floods

Natural disasters characterized by the overflow of water onto land that is normally dry, often caused by heavy rainfall, storm surges, or the melting of snow and ice.

Droughts

Extended periods of unusually low precipitation leading to a shortage of water.

Human-Activated

Refers to processes or systems that require human action to be initiated or operated, distinguishing from those that function automatically or naturally.