Owen Duffy wrote:
The voltage at the point may be higher than under matched conditions for
the same load power, and that may cause insulation breakdown.

Caused by the in-phase superposition of forward and
reflected voltages.

The current at the point may be higher than under matched conditions for
the same load power, and that would cause higher loss in conductors and
may result in damage.

Caused by the in-phase superposition of forward and
reflected currents.

None of these explanations require designating "reflected power" at a
point, or implying that it is the energy in "reflected power" that is
totally and solely responsible for the physical damage.

EM wave energy necessarily travels at the speed of light.
There is exactly the amount of EM wave energy contained
in a transmission line to support the forward power and
reflected power.
--
73, Cecil http://www.w5dxp.com