We all remember last year's tropical storm Isaias and the destruction left behind.
As Isaias was storming over Philadelphia, people in Manayunk were literally life-rafted out of their homes by black water.
Also called "category 3," black water soaks right into the building materials and fills surfaces with bacteria that will breed and feed on those materials.
Higher temperatures, higher humidity levels, and stagnant air create the best conditions for bacteria to thrive.
So, imagine what the people from Manayunk had to go through.