People and pets weren’t the only ones getting warmed up by the recent heat wave. Even Lake Michigan felt the rising temps and hung on to some of it, as evidenced by a recent post from the NOAA National Weather Service. 
“In fact, the south mid lake buoy reached 80 degrees on Friday, July 6th. This is rather rare, as in the 31 years of data, a temperature of 80 degrees has only been recorded during six prior episodes. This is also the earliest 80 degrees has ever been recorded at the south mid lake buoy.
It is also worth noting that during the past warm period between, July 1st and July 6th, the water temperature rose 10 degrees!”
Read more about these record water temps at the link above.