2009 Jeddah floods
On 25 November 2009, heavy floods affected the city and other areas of Makkah Province The floods were described by civil defence officials as the worst in 27 years. As of 26 November 2009, 77 people were reported to have been killed, and more than 350 were missing. Some roads were under a metre (three feet) of water on 26 November, and many of the victims were believed to have drowned in their cars. At least 3,000 vehicles were swept away or damaged. The death toll was expected to rise as flood waters receded, allowing rescuers to reach stranded vehicles.( source )
2011 Jeddah floods
On 26 January 2011, heavy floods affected the city and other areas of Makkah Province. The cumulative rainfall exceeded the 90 mm recorded in four hours during the 25 November 2009 flash floods. Streets including Palestine Street, Madinah Road and Wali Al-Ahad Street were either flooded or jammed with traffic. Cars were seen floating in some places. Meanwhile, eyewitnesses told local newspaper Arab News that East Jeddah was swamped and floodwater was rushing west towards the Red Sea, turning streets into rivers once again.
( source )