Unplanned global oil supply disruptions averaged more than 3.6 million barrels per day (b/d) in May 2016, the highest monthly level recorded since EIA started tracking global disruptions in January 2011. From April to May, disruptions grew by 0.8 million b/d as increased outages, largely in Canada, Nigeria, Iraq, and Libya, more than offset reduced outages in Kuwait, Brazil, and Ghana. Along with other factors such as rising oil demand and falling U.S. crude oil production, the rise in disruptions contributed to a month-over-month $5 per barrel increase in Brent crude oil spot prices in May. In Canada, the evacuation of oil workers because of wildfires in Fort McMurray, Alberta, reduced Canada’s oil sands production and led to an average 0.8 million b/d supply disruption in May, with a daily disruption peak of more than 1.1 million b/d. In late May, workers began returning to the area, and production is gradually restarting at a number of projects.