In New Orleans flooding can happen anytime, but June, July & August are our rainiest months. When there's a flood risk, the National Weather Service issues alerts.
Flash Flood Watch: flash flooding is possible
Flash Flood Warning: flash flooding is happening or is about to happen
Coastal Flood Watch: moderate to major coastal flooding is possible (areas outside levees)
Coastal Flood Warning: moderate to major coastal flooding is happening or is about to happen (areas outside levees)