Forecasters warn that slow-moving storms could bring heavy downpours to already saturated areas, increasing the risk of flash flooding.

Texas on Saturday faces an upper-atmosphere wave of low pressure that could trigger storms and an increasingly deep flow of Gulf moisture.

The intense rainfall and flash floods are the deadliest weather disaster in the US since President Donald Trump's administration conducted mass staff cuts at two key weather and climate agencies : the National Oceanic and Atmospheric Organisation (NOAA) and its subsidiary, the National Weather Service (NWS).

Some regions in the mid-Atlantic are also facing risks of flooding. On Sunday, Tropical Storm Chantal flooded parts of North Carolina, where more than 10 inches of rain fell near the Chapel Hill area. The Haw River, near Bynum, North Carolina, crested to nearly 22 feet, the highest crest on record there, as a result of those heavy rains.

More rain will hit Texas this weekend, with localized amounts as high as 8 inches, only a week after the region was inundated with flash floods. National Weather Service (NWS) meteorologists issued widespread flood watches across the Lonestar State on Friday, warning of additional heavy rainfall that could cause further flooding.

In the early hours of Independence Day, rain pelted sleeping communities in central Texas. No one knew yet how devastating the storm would become.

Climate change is making severe storms worse, heightening the need for the development of advanced forecasting models, but severe storm research is on the chopping block.

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