Why drugs in B.C. are so prevalent and the use of these substances is so "high."

The problem of drugs in British Columbia is, unfortunately, on the rise and not on the decline.
For example, there has been a sharp increase in fatal overdoses involving illicit drug use, with 465 people dying as a result of illicit drug use in 2015, which is a 27% increase from the year preceding 2015, as well as being the highest rate seen since 1998! One drug in particular has taken hold in our province: Fentanyl. The excessive amount of overdoses concerning this drug, especially when combined with other substances such as Cocaine is truly frightening. From January of 2016 to August of the same year, there were 488 overdose deaths due to Fentanyl, and, when we compare that number alone to the 505 overdose deaths TOTAL in 2015, it's sickening.
Take the city of Vancouver for example, why does it have so many drug related issues? Well, for starters, it's a port city, meaning that there is a constant flow of incoming and outgoing shipments from its harbour. This is an attractive feature because it allows for the transport of illegal narcotics into and out if the area to occur with greater ease and frequency. Vancouver also attracts all kinds of people and because it is so large, it becomes much easier for people to get overlooked or be forgotten about. Many runaways, as well as homeless, and desperate people seek refuge here, thus adding to crowding as well as providing dealers with cliental. As the population of people swells, so too does the demand for the product, thus increasing its availability and increased usage. Many people turn to drugs as a way to numb themselves, for example, victims of abuse as well as sex trade workers(some of whom may also be abide vitims