High pressure over the Plains is keeping the weather pattern stable, allowing heat to build and expand up the Eastern Seaboard.

CNN: Heat advisories issued to states dwindles to 15

Apparently the microwavable pad housed a chemical substance (manufactured by ADEKA) not quite stable enough to handle the heat, sparking a lengthy list of of cases where the liquid erupted from its container and provided an uncomfortable surprise to the poor soul embracing the creature's volcanic warmth.

ENGADGET: Exploding Hello Kitty toys recalled

Instead, a low-energy nuclear reactor (LENR) uses common, stable elements like nickel, carbon, and hydrogen to produce stable products like copper or nitrogen, along with heat and electricity.

FORBES: NASA: A Nuclear Reactor To Replace Your Water Heater