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

As ominous storm clouds gather once more over Texas, the desperate search for more than 150 individuals still missing since the catastrophic July 4 floods has now stretched into its second week.

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

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).

Officials says this project was made possible because of years of planning, persistent grant writing and a commitment to public safety.

Steep hills, shallow soils and a fault zone have made Hill Country, also called "flash flood alley," one of the state's most dangerous regions.

Precipitation varied significantly across the metro area Tuesday, from 0.06 inches by DFW airport to over 4 inches near downtown Dallas.

At Camp Mystic, a Christian summer camp in Hunt, Texas, where officials are grieving the loss of 27 children and counselors, belongings of the young campers were strewn about the flooded floors of a dormitory, while other items, including a pink backpack and a Camp Mystic T-shirt, were found along the bloated Guadalupe River, photos show.