+ is an overflow or accumulation of water that submerges land that is usually dry. Floods can be caused by heavy rainfall, melting snow, or dam failure.

+ occur in low-lying areas, such as river valleys, coastal areas, and deltas.

+ often cause damage to property and infrastructure, and can also lead to loss of life.

+ can be predicted and mitigated through measures such as flood control systems and early warning systems.

An avalanche

+ is a rapid flow of snow down a slope. Avalanches can be triggered by a variety of factors, such as heavy snowfall, strong winds, and earthquakes.

+ occur in mountainous areas, where snow accumulates on steep slopes.

+ often cause damage to property and infrastructure, and can also lead to loss of life.

+ are difficult to predict and mitigate, as they can occur without warning.