n. 大热天

Scorch \Scorch\, v. i.
1. To be burnt on the surface; to be parched; to be dried up.

Scatter a little mungy straw or fern amongst your
seedlings, to prevent the roots from scorching.
--Mortimer.

2. To burn or be burnt.

He laid his long forefinger on the scarlet letter,
which forthwith seemed to scorch into Hester's
breast, as if it had been red hot. --Hawthorne.

3. To ride or drive at great, usually at excessive, speed; --
applied chiefly to automobilists and bicyclists. [Colloq.]
-- {Scorch"er}, n. [Colloq.]

scorcher \scorch"er\
a very hot day. [Informal]
[PJC]