Glass can break in the microwave, but not for the same reasons as it might in a radiant heat oven.u003cbr/u003eu003cbr/u003eMicrowaves don’t generate nearly enough heat to melt glass. However, if you are using poor-quality glass, any bubbles or imperfections can get very hot. This could lead to the glass cracking and breaking in the microwave.u003cbr/u003eu003cbr/u003eAlso, glass that already had cracks or other damage is at a very high risk of breaking when heated.