In recent days heatwaves have turned swathes of our country into furnaces.
最近一段時間，熱浪來襲，把我們國家的大片地區都變成了火爐。

heatwave 一段天氣異常炎熱的時期; 酷熱期；熱浪
swathes of our country = large parts of our country
我們國家的很多地方

furnace 火爐，熔爐
It's like a furnace in here.
這里熱得像火爐。
In recent days heatwaves have turned swathes of X into furnaces.
最近一段時間，熱浪來襲，某某地方的大片地區都變成了火爐。

It smells like ham trapped behind a radiator.
聞上去就像火腿卡在了暖氣片里。

baking used to say that a person or place is very hot.
It's a baking hot morning.
上午太熱了！
I'm baking！
我好熱啊！

boiling 熾熱的，很熱的 boiling （very hot）or boiling hot.
It's a boiling hot day.
天氣酷熱。
I'm boiling.
我太熱了！
It's like a sauna.
（熱得）像在蒸桑拿。
It's like an oven.
（熱得）像在烤箱里烤一樣。