Harvey: Before and after photos show extent of Houston flooding

Hurricane Harvey dumped more than 1.21 metres of rain on Houston, Texas since making landfall Friday, leaving much of the city under water.

More than 13,000 people have been rescued in the Houston area and surrounding suburbs after nearly five days of torrential rain that resulted in the deaths of at least 20 people.

On Tuesday, officials said nearly all Houston-area waterways inundated by Harvey’s record rainfall have crested, but that water levels continue to rise in two flood-control reservoirs.

WATCH: Dramatic video shows the devastation Hurricane Harvey brought when it ripped through Texas

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Parts of the downtown core was submerged in more than three metres of water as a result of Buffalo Bayou river surging waters and the roughly 60-trillion litres of water that had fallen on the area since Friday.

Here’s a look at some before and after photos to give a sense of exactly how much water has submerged Houston.

(Google Maps/AP Photo/LM Otero)

(Google Maps/Reuters/Richard Carson)

(Google Maps/AP Photo/LM Otero)

(Google Maps/AP Photo/David J. Phillip)

(Google Maps/AP Photo/David J. Phillip)