1931 January 15
The Chamber of Commerce reported that 27 new manufacturing plants and warehouses, representing investments totaling $2 9,502,-000, started operations in the Pittsburgh district in 1930.

1931 January 16
Their funds exhausted, relief agencies warned that approximately 47,750 Pittsburgh district residents would "begin starving" immediately.

1931 January 27
Gulf Oil opened a new refinery on Neville Island.

1931 February 5
McClintock-Marshall and Bethlehem Steel Companies merged.

1931 March 11
The Homer Smith, pleasure steamboat, burned at the North Side wharf.

1931 March 17
The county commissioners voted $3,000,000 for construction of the Homestead High Level Bridge.

1931 May 11
Pittsburgh's first police radio "cruisers" were patrolling the streets as WPOU, police radio station, began broadcasting.

1931 June 3
Buhl Foundation announced plans for a 45-acre housing development on Mount Washington to be known as Chatham Village, the first low-rent community housing project in the nation.

1931 June 14
Florenz Ziegfeld's Follies opened the new season of their 23rd edition at the Nixon Theater; among those featured in the cast were Helen Morgan, Gladys Glad, Ruth Etting, Harry Richman, and, in the chorus, two Pittsburgh girls -- Zecil Silvonia and Mony Lange.

1931 June 25
Mayor Kline was indicted with Bertram L. Succop, former director of supplies, on 49 counts of misdemeanor in office.

1931 June 30
About 5000 hunger strikers paraded in the city streets.

1931 July 23
Forty-two aged men and women were killed in or died from the effects of a fire that destroyed the Little Sisters of the Poor Home at Penn Avenue and South Aiken; 157 others were hurt.

1931 July 29
Wiley Post and Harold Gatty, renowned round-the-world fliers, were given an enthusiastic welcome in Pittsburgh.

1931 August 19
The McKees Rocks-Ohio River Boulevard Bridge was opened.

1931 September 15
For the first time in Allegheny County, voting machines -- 186 of them -- were used in the primary election.