(CNN) The strongest hurricane to hit the United States in more than a decade was downgraded to a tropical storm on Saturday, but Harvey is far from over.

Sunday saw southeast Texas grappling with dangerous flooding as the storm continued to dump water on the state.

Here is what parts of south Texas look like after Harvey battered the area with wind and heavy rains:

Houston

Flooding in Houston prompted more than 1,000 high-water rescues as residents became trapped in their homes or attempted to flee.

A flood guage in an underpass warns of the water's depth on Interstate 10 in Houston on Sunday.

A man walks through deep water on Sunday in Houston.

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