Around 10,000 tonnes of recycled cardboard bales are on fire at the Smurfit Kappa paper mill in Birmingham, West Midlands Fire Service has said.
The service said crews and agencies are continuing to battle high winds but are "working extremely hard" to bring the blaze under control.
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The Grammy-winning singer posted a picture of the two on his Instagram saying the two got engaged right before the new year.
British Airways said it was taking the matter "extremely seriously" and is assisting police with their enquiries.
The rest of this weekend will see further spells of rain or snow across the UK. Icy roads expected