Donald Trump has declared an emergency in Louisiana as Tropical Storm Barry heads towards the state.

The streets of New Orleans flooded following an unprecedented amount of rainfall on Wednesday.

The heavy rainfall is expected to carry into Saturday morning with slow moving Storm Barry to result in further long duration heavy rainfall and flood threats along the central Gulf Coast and inland through the lower Mississippi valley.

''Rain Girl'' by renowned graffit artist Banksy is swamped by heavy rains flooded streets and businesses ahead of Tropical Depression Barry.10/07/2019. Image: Cheryl Gerber/Zuma Press/PA Images

Set to be the first tropical storm of the season, Storm Barry is expected to make landfall tonight, prompting evacuation warnings across the state.

With the risk of Storm Barry developing into a hurricane, The National Hurricane Center has warned residents to have their hurricane plan in place.

Tropical Storm Barry Advisory #8 Key Messages. pic.twitter.com/vejFOsUaB8

— National Hurricane Center (@NHC_Atlantic) July 12, 2019

Federal agencies are on standby, as well as three-thousand military personnel, helicopters and boats.

Main image: A French Quarter resident watches the heavy rain that flooded streets and businesses ahead of Tropical Depression Barry. 10/07/2019. Image:  Cheryl Gerber/Zuma Press/PA Images