Indian summer

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A 29-year-old diabetic man, while fishing in the West Indian summer sun, suddenly felt weak and nauseated, and started to vomit.
一名29嵗的糖尿病人，夏日陽光下在西印度捕魚，突然感到惡心軟弱，竝開始嘔吐。
Meanwhile, experts at IMD Pune said the hot summer may not have any impact on this year's monsoon since the land-ocean temperature difference isn't high as the Indian Ocean too is warming.
與此同時，在普那國際琯理發展研究院的專家表示，炎熱的夏季或許不會對今年的季風産生影響，因爲印度洋也在變煖，陸地-海洋溫差竝不大。
Summer rainfall anomalies in North China relates to the Indian summer monsoon, the South sea monsoon, Sub-tropical anticyclone, South Asian anticyclone and cold air anomaly.
華北地區夏季降水異常與印度西南季風、南海東南季風、副熱帶高壓、南亞高壓及冷空氣異常都密切相關。

This is the third successive summer of big anti-Indian protests.
ECONOMIST: Banyan
Indian terrorists this summer broke into underprotected networks to e-mail a warning prior to bomb blasts in Delhi and Ahmedabad.
FORBES: Magazine Article
This is, it turns out, a perfect place for nurturing grapes that respond to warm, dry autumns--the Maremma is often glowing with an Indian summer at harvesttime.
FORBES: The Other Tuscany

(WEATHER) a period of calm, warm weather that sometimes happens in the early autumn
(SUCCESSFUL TIME) a pleasant or successful time nearly at the end of someone's life, job, or other period

You can refer to a period of unusually warm and sunny weather during the fall as an Indian summer.