sweltering (adj.)

• ardent
• baking
• blistering
• burning
• canicular
• clammy
• close
• ebullient
• feverish
• fiery
• flushed
• heated
• hot
• humid
• melting
• muggy
• oppressive
• overheated
• red-hot
• scorching
• searing
• seething
• sizzling
• steaming
• steamy
• sticky
• stifling
• stuffy
• sudorific
• suffocating
• sultry
• sweltry
• torrid
• tropical
• wet
• white-hot