UPDATE 1-Oil operations restart as Alberta fire threat wanes

(Adds Imperial oil operations restart) May 24 (Reuters) - Oil companies are restarting operations and evacuation orders for work camps are being lifted near Fort McMurray, Alberta, as wildfires burning around the Canadian oil sands hub for most of May have stopped growing, officials said. The shutdown at major oil sites as a result of the wildfires has cut daily production by more than 1 million barrels, officials said. About half of the nation's oil sands capacity remains shut, accor