By Mia Rabson THE CANADIAN PRESS OTTAWA- The first draft of a new national disaster risk assessment report warns that a major earthquake in British Columbia or parts of Ontario and Quebec could swiftly become the most costly natural disaster Canada has seen. The national risk profile published Thursday morning is the government’s first attempt to identify the biggest threats Canada faces from natural disasters and to find ways to limit the possible damage. “It’s kind of like driving down the highway, and this is our attempt to illuminate, to turn the lights on and illuminate further down the road so that people can anticipate hazards,” said Emergency Preparedness Minister Bill Blair at a news conference. This first report is addressing floods, fires and earthquakes. Extreme heat…