There are plenty of reasons why an oven-safe dish might explode in the oven. Most of them, however, come down to what’s called thermal shock.u003cbr/u003eu003cbr/u003eSimply put, thermal shock results from glass expanding unevenly. If one part of the glass heats or cools more quickly than the surrounding glass, it can break. Oven-safe glass is more resistant to thermal shock but is by no means immune to it.