Torrential rains have caused havoc and at least one death on Wednesday afternoon in and around Johannesburg with cars submerged on several city roads and highways‚ prompting widespread traffic gridlock. The most heavily affected route was the R24 westbound where vehicles were submerged in flood waters after flash flooding. There was also a report that a section of the roof had collapsed at the OR Tambo International Airport as a result of the storm.According to the Rosebank Killarney Gazette, a boundary at the Johannesburg Zoo has collapsed. Motorists have been urged to drive cautiously.Emer-G-Med paramedics were on the scene on the N3 in Linksfield where upwards of 70 cars had been flooded."One person has died‚" the company added in a tweet at 6.51pm. Emer-G-Med paramedics are on-scene N3 Linksfield, where upwards of 70 cars have been flooded - some pushed off the road. One person has died pic.twitter.com/iw5cmgkHbw— EMER-G-MED (@EMER_G_MED) November 9, 2016aTwitter user‚ @saltwag posted: "Vehicles submerged‚ traffic at a standstill on R24 Westbound due to flash flooding. #JHBTraffic" Vehicles submerged, traffic at a standstill on R24 Westbound due to flash flooding. #JHBTrafficpic.twitter.com/wpA7LyLaJ0 — Michael Salzwedel (@saltwag) November 9, 2016dsNetstar Traffic also warned that there was flooding on the N3 in all directions at Gillooly's interchange. #JHBTraffic Flooding: N3 all directions at Gillooly's I/C, all lanes flooded. Please approach with extreme caution. pic.twitter.com/4mDXqAWiSk — Netstar Traffic (@netstartraffic) November 9, 2016sTraffic commentator Rob Byrne posted this warning: "JHB - #FLOODING #Gilloolys RT @RenayTandy @TrafficSA check out Gilloolys right now!! Heading N3 south. Avoid!!"JHB - #FLOODING#Gilloolys RT @RenayTandy@TrafficSA check out Gilloolys right now!! Heading N3 south. Avoid!! pic.twitter.com/GgMRveAnBh — Rob Byrne (@TrafficSA) November 9, 2016aAnother asked the motorists to be careful. "Cars are literally sinking in the flood. This is 5 minutes after Eastgate #JHBTraffic please be careful" Cars are literally sinking in the flood. This is 5 minutes after Eastgate #JHBTraffic please be careful pic.twitter.com/lRu2h9RsdC — Kumkanikazi (@Phix_Mabilisa) November 9, 2016s But @ChelseaGeach saw a funny side: "Damn! Joburg weather trying to make up for the entire drought in one afternoon? #JHBTraffic #JHBWeather" Damn! Joburg weather trying to make up for the entire drought in one afternoon? #JHBTraffic#JHBWeatherhttps://t.co/qZIpDilLXf — Chelsea Geach (@ChelseaGeach) November 9, 2016s- TMG Digital..