Canals are human-made channels, or artificial waterways... usually built on purpose for water conveyance, or to service water transport vehicles.
We're in the middle of monsoon season, and last night it rained so hard from around 10 pm until 7:30 this morning. Outside our house looks more like a canal than a road this morning. Our neighbourhood has expanded rapidly over the past few years. Five or six years ago this was mostly fields for crops or rice. Every few months, another plot of land is built on. Unstrategic building and road planning means the current drainage system isn't suitable for the current level of occupation. Where the water would have previously flowed into the fields providing much needed irrigation, now it follows the roads and causes many problems. When the waters receed, it invariably leaves behind it a damaged road. Every year the problem gets worse and very soon we will be driving on what looks like a dry riverbed.
This 'problem' for us is nothing compared to other parts of the country that will be suffering from floods and landslides, with essential crops washed away, and sometimes even whole houses and livestock lost.