Extreme heat causes electrical components to expand, increasing resistance and leading to sudden voltage drops within your home's circuitry. High humidity can further exacerbate this by causing minor arcing or corrosion in outdoor service connections, such as the weatherhead or meter base. Most flickers during a heatwave are the result of grid-wide brownouts or thermal expansion affecting the integrity of your main breaker or service mast. The Science of Thermal Expansion Whe
