Lake Ontario has disappeared from the SkyAware maps, both local and remote. The other Great Lakes and other water features all seem to be there.
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Niagra Falls was closed and Lake Ontario dried up? 
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It’s the OpenStreetMap layer, ESRI Street is OK.
Wrong direction, Ontario is the lowest of the Great Lakes so water flows from Lake Erie over Niagara Falls (and the some through Welland Canal) into Lake Ontario. The major outflow is the St. Lawrence Rive on the east end of Lake Ontario, at the border of New York State and Ontario CA. It eventually flows into the Atlantic Ocean.
@garycwelch
Agreed, but wharever the route and direction of outflow, it has emptied Lake Ontario 
I posted on OpenStreetMaps and received a reply that they had fixed the problem. I don’t know how long the change will take to propagate to SkyAware.
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I think you get map tiles directly from OpenStreetMap.
So it doesn’t involve SkyAware per se. At least that’s my understanding of how it works.
Edit: If you go to OpenStreetMap directly, there’s no lake Ontario. So I guess the haven’t fixed it yet.
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Lake Ontario still NOT available on Skyaware Map
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Lake Ontario available on AIS VesselFinder Map
https://discussions.flightaware.com/t/howto-run-ads-b-receiver-ais-receiver-on-same-rpi/85040
https://github.com/abcd567a/install-aiscatcher/blob/master/README.md
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A similar situation happened to my local Skyaware map several days ago. Vänern, the third largest lake in Europe, disappeared. Then only bits of it showed up depending on the zoom level. It got sorted out after a while.
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It’s back! They refilled Lake Ontario.
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