Recently I have been thinking about how many people have the belief Aquaman has a weakness to heat. That all it takes is some fire and he dries out and is helpless. I highly disagree with that notion. In fact I believe that it isn't simple heat that bothers him, but rather dryness in particular.
Prolonged exposure to heat blasts from Black Manta only succeed in giving Arthur some superficial burns. And swimming into a lava vent while the Dead King, Atlan melted and Arthur swam out, unharmed by the lava seemed to be no big deal to him. A potassium explosion triggered by Batman didn't slow him down. He has even taken blasts from Neutron, who is essentially a walking nuclear reactor.
And there are other ones that I didn't even include that show Aquaman not being bothered by heat. His one bad desert experience couldn't have been due to the weather alone when Arthur has been exposed to higher temperatures and been just fine.