That difference may not seem like much, but water has tremendous heat capacity. (discovermagazine.com)
Those gasses flow into the oxidizer section and the chemical reaction there creates tremendous heat and expanding gasses that flow through a nozzle creating the bulk of the motor's thrust. (sciencedaily.com)
In any case, any developing carbon - based life on a developing Earth - type planet would be subject to tremendous heat on a newly formed planet that is under intense asteroidal and cometary bombardment, in addition to the intense and deadly radiation produced by nearby supernovae and other massive young stars. (members.nova.org)