Tropical Depression Edouard made landfall along the Texas-Louisiana coast overnight, bringing heavy rain and a growing flood threat to parts of the state.

The downgraded storm system placed millions of Texans under flood watches overnight, and it could still produce continued flooding, gusty winds, and an isolated tornado through Wednesday, September 2. 

Edouard, which initially landed as a tropical storm, will continue to drift northwest over southeast Texas today as it moves further inland, primarily affecting portions of Deep East Texas, according to the National Weather Service. 

Forecasters say the gradually weakening storm poses a marginal to slight risk of excessive rainfall and flash flooding through Wednesday night. 

Rain amounts will likely vary, with 1-3 inches in certain areas and isolated totals of up to 4 or more inches possible in others. The heavy rains could lead to flooding in low-lying areas near rivers, creeks and roads.

In parts of Southeast Texas, more than 20 inches of rain fell overnight Tuesday, according to radar estimates and CNN.

The heaviest rainfall totals were recorded in East Texas' Hardin and Tyler counties, prompting the National Weather Service to issue a flash flood emergency alert. 

The weather agency says total rainfall along Edouard`s path is expected to range from 4 to 8 inches, with maximum totals up to 12 inches in parts of the Upper Texas Coast inland through east-central Texas.

The storm is expected to have limited impacts in San Antonio, where temperatures are expected to remain above average through early next week. However, portions of the Interstate 35 and Interstate 37 corridors could see low rain chances.

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This article originally published at Edouard dumps 20+ inches of rain in Texas as flood threat lingers.