Infographic: Hurricane Harvey and compound flooding
by U-Surge via Hal Needham
![](/sites/default/files/styles/content_header_image/public/resources/compound_flooding.jpg.webp?itok=l-g_xInO)
Original text with graphic: Catastrophic compound (rain/surge) flooding may occur where storm surge impedes torrential rains from running off into places like Galveston Bay. The yellow area depicts a battle ground where fresh water and salt water could collide.
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In Galveston, the sea surge was about 3 feet, but the actual water surge was about 9 feet due to compound flooding.[1]
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Note: Title updated from original to reflected observed data