Help! PS4 beeped three times and shut down

This happened just a half and hour ago. My husband and I were playing Fortnite and without warning his PS4 suddenly beeped three times and then turned off. When he tried to turn it back on, while it was rebuilding the data base, it did the same thing again!

Why is this happening? Is the PS4 gone? Online research seems to conclude that it’s either the PS4 or power cord overheating. Could it be that simple? He has the original model that he got in 2014/2015. We use the PS4 every day, hours at a time, with no issues so this stunned us.

Also, we’re unsure if his save data was uploaded to the Cloud or not. If not, is there any way to get it back?