What August 4, 2014 actually did
Rain through the afternoon and evening put water into more than three thousand Burlington basements.
The City's Tuck Creek flood study cites Conservation Halton for the 190 millimetre total and names Tuck, Shoreacres, Roseland and Appleby Creek as the watersheds worst affected. On Tuck Creek alone, thirteen culverts overtopped, at New Street, Regal Road and Spruce Avenue among others.
Some of that was creek water going where creek water goes. A good deal of it was sanitary sewer surcharge pushing back up through basement floor drains, which is a different failure with a different fix. The two got conflated in a lot of conversations afterward, and still do.