Fourteen people have died and four are missing due to torrential rain, said the Saudi Civil Defense General Directorate.
From Monday night until midday Tuesday, Saudi authorities received more than 4,213 reports from across the kingdom of accidents resulting from torrential rainfall.
Classes have been suspended in affected areas of the country.
Civil Defense forces said they have saved more than 937 people trapped in their homes and cars, and have housed and helped more than 695 families.
There have been 307 reports of traffic accidents and people trapped in their cars, but no fatalities have been recorded in these incidents.