I would like to see a reference for the scientific 'guarantee' that sea levels will rise by 2 metres in the next 85 years.  I have found some predictions that might occur but they seem to be based on the most extreme climate model results, far above the average of the models.

Articles on current and recent (since 1950) sea level rises estimate a worldwide rise somewhere between 1 and 3 mm per year with no rate acceleration over that time.  If you use the upper rate for the estimate you get a sea level increase of 25.5 cm over the next 85 years, about 1/8 of what Ian Brown says is the minimum sea level increase.  This is still a concern but far from the scary scenario laid out in the article.

In his chaos statement Mr. Brown associates Toronto with various coastal cities in a concurrent flooding scenario even though Toronto is more than 70 metres above sea level.

Overall a passable piece of scare fiction.