The Tyrant map was specifically removed due to glowies spawning in the lava, making the mission non-completable. Not sure about the Hess map you mention. The only other lava-containing mission I recall offhand is the Bat'zul map, and I don't think that was ever in the MA to begin with (perhaps for similar reasons, I dunno).
And for a while things were cold,
They were scared down in their holes
The forest that once was green
Was colored black by those killing machines
[ QUOTE ]
... Not sure about the Hess map you mention...
[/ QUOTE ]
It's the one with the giant robot in the middle of the room. Can't miss it. 
If that one is gone as well, I know a SG mate who will be ticked off as that was the premise or her entire MArc. 
█ Players Guide to the Cities
The giant robot is still there, cause chicks dig giant robots.
Eva Destruction AR/Fire/Munitions Blaster
Darkfire Avenger DM/SD/Body Scrapper
Arc ID#161629 Freaks, Geeks, and Men in Black
Arc ID#431270 Until the End of the World
Several of the CoT maps have small lava pools in certain rooms IIRC... you might investigate some of those.
Janrith
Triumph Heroes:
=============
Saunik: lvl 50 Mutant Sonic/Electric Blaster
Photaun: lvl 50 Peacebringer
Taukezo Kensei: lvl 50 Natural Willpower/Dual Blades Tank
Published Arcs:
7326 Avenging the Dead
135096 Superhero Downtime
I cannot find any maps in MA that have lava on them. I'm mainly looking for the last mission of the "Hero's Hero" arc from Maria Jenkins, as at the end you battle Tyrant in a map that has some lava.
Can anyone tell me what category it is in? Or do I have to purchase a custom map pack with tickets for it? Or any other maps with lava? I was also looking for the Striga Isle Volcano map from the Hess TF.