A large winter storm that caused flight delays and surprised residents across the Northeast with heavy snow has left nearly 3 million customers without power and three people dead.

The storm, which dropped inches of snow, sleet, and rain throughout the region Saturday continued to deliver high winds and swelling seas on Sunday.

According to the New York Times, the strong weather system moving into the Northeast from the Atlantic Ocean downed power lines and broke records, eliciting winter warnings from officials earlier in the year than any in recent memory.