Blues legend B.B. King performs on stage at Humphrey's Concerts By The Bay on Aug. 27, 2014 in San Diego.
Daniel Knighton—Getty Images
October 5, 2014 11:59 AM EDT

Celebrities have made “dehydration” and “exhaustion” a cause for suspicion, not concern, in the past several years, but when the icon suffering is blues legend B.B. King, the news is more sobering.

The 89-year-old guitarist has canceled the remaining eight dates on his tour after becoming ill during a Friday evening performance at the House of Blues in Chicago, King’s official website announced Saturday. After the performance, a doctor evaluated King and quickly diagnosed him.

Write to Nolan Feeney at nolan.feeney@time.com.

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