How did George Harrison's parents die?

Answer 1

They both died of cancer; his mother Louise in 1970, and his father Harry in 1978. Harrison wrote "Deep Blue" (the B-side to "Bangla Desh") about visiting his mother in the hospital, when she was dying.

Harrison and his wife Olivia later told a story, that the night Harry died, they both awoke to a strange blue light in their bedroom, and saw a vision of Harry smiling down at them.

Answer 2

His mother died from a brain tumor, and his father died from lung cancer.