Sentence:  Truth be told, I enjoyed the earthquake of '89; ... It was a warm night, <WSD>Indian summer</WSD>. The whole city seemed to be out of doors. It was like an enormous block party, all the neighbors sitting on their stoops, drinking beer, listening to their radios. 
Meaning of the word marked with <WSD> tags:  A stretch of sunny and warm, often hazy, days during late autumn. (from late 18th c., popularized in the early 19th c.)<ref>Matthews (February 1902), page 73.</ref>