hot and humid 湿热

hot and dry 干热

hot spell 连续高温天气

heat stroke/sunstroke 中暑

heat wave 热浪

heat-related illnesses 高温病

heat-resistant 抗热的/耐热的

sauna days 桑拿天

sizzling/severe heat 酷热

scorching sun 烈日、骄阳

blistering summer day 炎炎夏日

torrid sun 灼热的太阳

sultry weather 湿热难耐的天气

heat up 升温

stiflingly hot 闷热 

be bathed/soaked with sweat 汗流浃背

heat alert 高温预警

beat the heat 消暑

escape the heat 避暑