A card scheduled for March 21st in London is being moved to a different location, and White is trying to replace fighters after headliner Leon Edwards pulled out of his match with Tyron Woodley due to travel concerns.
The UFC is also trying to find new locations for upcoming events previously scheduled to take place in Columbus and Portland.
The UFC did stage an event in Brazil over the weekend, but no fans attended.
Windsor's Randa Markos lost her fight to Amanda Ribas by unanimous decision.
with files from Canadian Press