[cont'd]

well away from known hazards, especially one where the usual scenario is this: a release of liquid under such pressure results in a geyser effect. The soil cover is blown off and a jet of flammable liquid sprays upward. Fresh hydrocarbon vapours are extremely flammable, especially when available as an aerosol. All that's required for ignition is a spark, which is why pipeline safety information lists the sorts of devices that could start a conflagration: motors & exhaust pipes, phones, pagers, even flashlights. Also electrical devices, including fire alarms, HVAC systems and elevators.

Consequently, Torontonians at these sites (there are a dozen of them that I'm aware of) could find themselves facing the same sort of unexpected, desperate situation as the folks at Grenfell, needing to evacuate from upper levels via increasingly congested stairways. 

Like Grenfell, entirely avoidable. 
Torontonians should be smart enough to stop such development before a tragedy, not after.