What is waterlogging and flooding?
Soils become waterlogged when water is unable to drain away. This leaves no air spaces in the saturated soil, and plant roots literally drown. Waterlogging is common on naturally poorly drained soils or when heavy soils are compacted.
Short-lived flash floods after a downpour seldom harm most plants. It is prolonged, saturated soil that cause the most damage as the oxygen is used up by the plant roots and soil microorganisms.
Flooding from overflowing drains can add the complication of sewage and waste water, especially if growing edible crops.