Meanings of risk a break in английском

Obviously they could not risk a break in the clouds.

No doubt his associates knew that he was pressed for money and could not risk a break.

Can't you see that it's false economy to risk a break-down even if you use yourself purely for others?

Palmerston, whose tenure of power was none too secure, dared not risk a break that might carry the disaffected into the ranks of the Opposition.