Mriehel slopes downwards 25m from north to south, that is, from Notabile Road adjacent to Birkirkara down to the Mriehel bypass adjacent to Qormi. No wonder, therefore, that the south side of Mriehel is susceptible to flooding during heavy downpours. The Foundation has received various complaints on this topic especially from employees working around the area at the bottom of Triq San Gwakkin.