Sorry about the "rofl" thing. But in my EMS experience we would never land close enough to the actual scene to cause anything to get blown. Always a good distance from the wreck where all the first responders are gathered doing their thing.
Jonathan, next time you're on a scene try to get a minute to chat to the pilot(s). We are always willing and eager to chat it up with fire and medic crews about how everyone goes about their business and making it safer.
I'm also curious by your initial post, saying you'd never clear a helicopter to land somewhere you felt unsafe. Do the UK pilots not have the final say in where to land or does it have to be at the LZ marked out on the ground? I wouldn't have been popular in that case lol... had a running joke that the ring of flares was the one place you probably did not want to land
Perhaps the roads are bigger in Canada?
What you call a road, we call sidewalks
