Zaxares: I've been using Ray of Frost from my Wizard to extinguish fire fields for me to get through safely. Likewise, I've also been using Fire Bolt to ignite pools of grease or other hazardous liquids if I don't plan on using it in an upcoming battle.
J Lo: Ray of frost works on smoldering embers. I'm at the burning mansion right now, and I'm having a lot of difficulty because it doesn't work with a raging fire.
You can also jump over difficult areas. If the distance is too far and you have a Wizard or Sorcerer with the Enhance Leap ritual spell or a character that's taken the Ritual Caster feat with this spell, you can triple your jumping distance for free outside of combat. When taking this approach, it's best to unchain your party and control them individually when doing this. Otherwise they'll happily wander all over dangerous terrain when they follow you.
A related ritual spell is Feather Fall if you're jumping down from damaging heights.
