Meltdown and Turning point

Meltdown noun - Severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping.

Turning point and meltdown are semantically related. in crisis topic. In some cases you can use "Turning point" instead a noun "Meltdown".

Turning point noun - A point in a chain of events at which an important change (as in one's fortunes) occurs.

Meltdown and turning point are semantically related. Sometimes you can use "Meltdown" instead a noun phrase "Turning point".