The news of his sudden death came as a bolt from the blue. この英文の意味は？

Q The news of his sudden death came as a bolt from the blue. この英文の意味は？

ざ にゅーず おぶ ひず さどん です けいむ あず あ ぼると ふろむ ざ ぶるー。このえいぶんのいみは？