At least 30 people have been killed in Saudi Arabia's flash flood  across the kingdom over the past month.

"The number of deaths from floods and related electric shocks has reached 30," the Saudi civil defense said in a statement.

The statement added that nearly 1,480 people had to be rescued and that a majority of those rescued were in the capital, Riyadh.

According to the same statement, "as many as 3,865 people were evacuated from flooded areas while 2,001 people were provided shelter".

The Civil Defence called on all Saudis to "take precautions, not to travel to flood areas or valleys which are prone to experience heavy rain".

Saudi Civil Defence urged residents in Jeddah to stay indoors as a deadly storm bringing heavy rain is expected in the Red Sea coastal city over the weekend.

Between Saturday and Tuesday morning, 10 people died in Makkah, five in Al Baha, three each in Aseer and the Eastern regions, two each in Hayel, Jazan and Tabouk and one each in Riyadh, Al Jouf and Najran.