sweltering

/S W EH1 L T ER0 IH0 NG/
verb
  1. 1

    To suffer terribly from intense heat.

  2. 2

    To perspire greatly from heat.

  3. 3

    To cause to faint, to overpower, as with heat.

noun
  1. 1

    The situation of being or feeling hot and humid.

adjective
  1. 1

    (of weather) hot and humid; oppressively sticky

    โ€œThe day was sweltering, so Lauren put on the shortest pair of shorts she could find and went to get ice-cream with her friend Rob.โ€

Source: https://en.wiktionary.org/wiki/swelter, https://en.wiktionary.org/wiki/sweltering