Sense helped me see a brown out

For the last couple weeks we seen the lights in our master bedroom flash. Did not think anything about it as this happens with older houses.
Well last night the power in half my house was powering off and this really took me by surprise.

I open up my Sense app went to the Sense it ser to see the sensor readings and look at that. 18volts on one phase. So I called my power company and they replaced my connectors to the main to the pole as they had oxidized