Flood Index
1-5 level flood risk indicator based on extensive return period analysis of fluvial (riverine) and pluvial (aerial / overland) flood return periods.
Floods cause more than $40 billion in damage worldwide annually.
City A
City B
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severity - 1 minor
Flood Index: 1
Minor flash flooding possible. Rivers may go out of their banks briefly.
severity - 2 moderate
Flood Index: 2
Moderate flash flooding possible. Rivers experiencing flooding conditions with minor impacts to homes and businesses.
severity - 3 sever
Flood Index: 3
Significant flash flooding possible. Could lead to disruptions with river flooding also significant enough to threaten homes and businesses.
severity - 4 extreme
Flood Index: 4
Major river and/or flash flooding possible. Major disruptions to transportation, along with significant impacts to homes/businesses.
severity - 4 extreme
Flood Index: 5
Catastrophic or extreme river and/or flash flooding probable or likely. Extreme impacts along river networks and low-lying areas.