The apparent list to starboard may be due to the obviously stiff wind from port as evidenced by the flags and stack smoke plus, the ship has a ton of freeboard which will subject it to crosswind.

Not long after the horrific tragedy in the Chicago River, SS Eastland was raised and repurposed as the gunboat USS Wilmette in the employ of the US Navy Reserve. She served mostly as a training ship for Naval Reservists from 1918 until just after the end of World War II and sold for scrap in October 1945.

Wikipedia has a good rundown of the SS Eastland tragedy. Shortly after being launched in 1903, the Eastland was modified to have a shallower draft for trips on the Black River in South Haven, Michigan. At the same time, air conditioning was added, and modifications were made to increase the ship's speed. These combined modifications reduced the ship's metacentric height (I learned a new term), making it less stable. Recognizing there was now a stability problem, the passenger limit was lowered from 3,000 to 2,800. Cabins were removed and the smokestacks shortened. Alterations continued to be made to improve the ship's stability, while other alterations made it worse. During these 12 years of operation, the ship went through five different owners. No alteration remedied the listing problem and, in 1915 the approved passenger capacity was increased to 2,570 after more lifeboats had been added (post Titanic), making the ship even more top heavy.

Clarence Darrow represented the Eastland's owners and officers in a criminal trial. They were found not guilty.

I've read that, post Titanic, the ship was outfitted with additional lifeboats, something which would have made the ship even more top-heavy.

She appears to be listing to starboard here. A horrible tragedy, which my grandparents remembered many years later as being in the news, and never forgot.

The listing problems were made worse in 1912 after the Titanic sank. Ships were required by law to have enough lifeboat capacity for everyone on board. To meet the requirement, they added more lifeboats to the top deck, making it more top heavy.

When passengers boarded for the Western Electric excursion, many flocked to the top deck on the shore side to wave to people there, and extra weight up there caused it to capsize.

George Halas, later the founder of the Chicago Bears and the National Football League, was supposed to be on that trip.

Here is the Eastland Disaster Historical Society account of that fateful day:

The S.S. Eastland, known as the "Speed Queen of the Great Lakes," was part of a fleet of five excursion boats assigned to take Western Electric employees, families and friends across Lake Michigan to Michigan City, Indiana, for a day of fun and fellowship. But the festivities were short-lived and quickly turned tragic.

The Eastland, docked at the Clark Street Bridge, never left the Chicago River. Tragedy struck as the ship rolled over into the river at the wharf's edge. More than 2,500 passengers and crew members were on board that day – and 844 people lost their lives, including 22 entire families.

The Response
Months of planning and preparation for the excursion and picnic led up to the Eastland Disaster, but the tragedy itself was over in a matter of minutes. However, the rescue and recovery efforts following the tragedy went on for days, even weeks.

The 'Eastland' disaster of 1915 was extensively recorded in both still photography and film (discovered in 2015).

The images are horrific. Ironically this was the least deadly of four notorious ship catastrophes within less than a dozen years: the burning of the 'General Slocum' in New York's East River in 1904 (1,021 deaths, and mentioned in Joyce's 'Ulysses'), the 'Titanic' in 1912 (1517), and the torpedoing of the 'Lusitania' (1199) just two months prior to the 'Eastland' rollover's 844 deaths.