There is never a good time for an older citizen to go missing and all weathers could cause problems but heatwaves can be deadly.
Noakes' wife Vicky put out an appeal for information on his whereabouts reports the Daily Mirror. And social media quickly got on the case.
It is the hottest day of the year so far in Spain adding to family concerns.
The local council in Majorca helped out adding an appeal on its website.
At 1pm the search was still on for Noakes who has Alzheimer's.
British children of the 50's and 60's will remember Mr. Noakes fondly as a likeable and funny presenter on one of the few BBC's flagship children's shows of the day. He was a down to earth presenter who did not have the frills and fancy accent of son many others back then.
An animal lover, kids of that era will not be able to think of John without remembering Shep the Blue Peter sheepdog who so often accompanied him. Please tweet this appeal and share on social media in the hope that Mr. Noakes will be found soon, and that he is safe and well.
The Mail Online has titled its report "Police searching for 'missing' Blue Peter legend John Noakes after the 81-year-old's wife raised the alarm when he failed to return from a walk by their Spanish home" and legend is not an exaggeration.
After been found a little while ago John Noakes was taken to the Son Espases Hospital in Palma, Majorca and he is reportedly in a bad, though not life threatening, condition.