If its still under warranty I would go to an Apple Store to get it serviced
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=== Update (05/20/2019) ===
As far as your house: I do recommend you get an electrician to come in to check your outlets are properly wired. You could get a simple go - no go tester from the local hardware store like this one [https://www.homedepot.com/p/Power-Gear-3-Wire-Receptacle-Tester-50542/206212329|3-Wire Outlet Tester] to do a quick test of your outlets.
Often times mis-wired outlets can cause issues when the ground is not properly connected. I’ve seen outlets just with the two active wires connected and the ground wasn’t connected at all! The other issue is within your breaker panel and the connection to ground. This is where a copper water pipe leaving your house is used. or one or more grounding rods are pushed into the ground in the cellar that act as the ground point. Make sure the ground line is not corroded up on the rod and the rod/s are in good shape.
The reason this is important is when you have a lighting strike near by the voltage spike can get into your system via the outlet either directly or indirectly via a network or other device that’s plugged into your Mac.
I do recommend getting a good surge suppressor or better yet a UPS. These help in protecting your equipment from power line surges and dropouts as well as lighting strikes.
You might want to get from your power provider a logging power meter so your power coming to your house can be checked. Its a free service you want to have it for at least a mouth.
If its still under warranty I would go to an Apple Store to get it serviced
+
+
=== Update (05/20/2019) ===
+
As far as your house: I do recommend you get an electrician to come in to check your outlets are properly wired. You could get a simple go - no go tester from the local hardware store like this one [https://www.homedepot.com/p/Power-Gear-3-Wire-Receptacle-Tester-50542/206212329|3-Wire Outlet Tester] to do a quick test of your outlets.
+
+
Often times mis-wired outlets can cause issues when the ground is not properly connected. I’ve seen outlets just with the two active wires connected and the ground wasn’t connected at all! The other issue is within your breaker panel and the connection to ground. This is where a copper water pipe leaving your house is used. or one or more grounding rods are pushed into the ground in the cellar that act as the ground point. Make sure the ground line is not corroded up on the rod and the rod/s are in good shape.
+
+
The reason this is important is when you have a lighting strike near by the voltage spike can get into your system via the outlet either directly or indirectly via a network or other device that’s plugged into your Mac.
+
+
I do recommend getting a good surge suppressor or better yet a UPS. These help in protecting your equipment from power line surges and dropouts as well as lighting strikes.
+
+
You might want to get from your power provider a logging power meter so your power coming to your house can be checked. Its a free service you want to have it for at least a mouth.