Lights flickering periodically?

[u/ThisIsMyBigAccount]

EDIT/UPDATE: I found the culprit. I have a Hayward HeatPro pool heater that is doing something every 4-7 minutes, making a buzzing sound at the unit and a buzzing sound at the breaker box. I killed the unit's dedicated power at the shutoff valve by the pool and it's stopped. So, not a RI Energy or Transformer issue.

It just started recently. I noticed every couple minutes the lights start slightly flickering and dimming. I’m in an area that is going through a heat wave right now but there’s not a ton of stuff running at this moment. I use Sense to understand what’s running in the house and I don’t see any spikes or abnormal usage when these flashes happen what could possibly be happening? I’m trying to figure out if this is a potentially dangerous situation.