炎暑[ensho] heat wave
寒暑[kansho] hot and cold
劇暑[gekisho] severe heat
厳暑[gensho] extreme heat
向暑[kousho] facing the heat

酷暑[kokusho] intense heat
残暑[zansho] late summer heat
暑い[atsui] hot (weather, etc.)
暑がり[atsugari] (person) sensitive to heat
暑さ[atsusa] heat (of the weather)

今秋[konshuu] this (next, last) autumn (fall)
三尺の秋水[sanjakunoshuusui] sharpened sword
三秋[sanshuu] three autumn months
三秋の思い[sanshuunoomoi] longing for loved ones

秋の色[akinoiro] autumnal tints
秋雨[akisame] autumn rain
秋気[shuuki] autumn air
秋口[akiguchi] beginning of autumn