The present disclosure provides devices and methods for cleaning up or burning spills of burnable materials in situ. In some embodiments, a system for burning a burnable material comprises a base having a first side configured for placement on a surface with a burnable material and a second side; and a plurality heat conducting members extending from the second side of the base.

A heating device for heating underground soil comprising a work-coil housed in a conductive casing, wherein when at least one driving current is supplied to the work-coil, whereby the work-coil generates at least one magnetic field that induces at least one induced current in the casing. The driving currents are of a frequency sufficiently high to cause the induced currents to generate resistance in the casing, thereby increasing the temperature of the casing. A plurality of the heating devices may be arranged in an array to facilitate the heating of a zone of soil.