From refined fuels such as gasoline, to natural resources including animal dung and coal, there are many sources of fuel for use off the grid or after the SHTF.
A serious survival situation will set society back to a more primitive state. Heating your home with these methods is the only way to ensure long-term survival.
One of the most important survival strategies following an EMP event is evacuation, either to a bug out location or to an area not affected by the EMP.
Not only have EMPs been weaponized, meaning that a rival military force could use one against US, terrorist organizations have also adopted the technology.