Here a sudden threat can arrive on home ground.

She looked away so that he shouldn't see the sudden threat of tears.

The horse screamed and reared, trying to shy away from the sudden threat.

Startled by the sudden threat, Roman glanced at his tactical monitor.

The sudden threat in her tone seemed to annul everything she had just said.

Men prepare for a sudden and strange threat, but while it holds off they do not believe in it.

We had been so happy all week long until this sudden threat of his to kill me and then himself".

Who do I call to report an oil spill or other environmental emergency that poses a sudden threat to public health?

For emergencies and other sudden threats to public health, such as:

These days, everybody knows what to do about the sudden threat of deadly danger; they've seen it time and time again on television.