live paycheck to paycheck

If you're living paycheck to paycheck, barely making it from one pay period to the next without running out of money, you may be ready for a change. You can break the paycheck-to-paycheck cycle by evaluating where you spend money, creating a budget, cutting costs and employing other good money habits.

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flash flood

A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing over ice sheets or snowfields.

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to push the envelope

To push the envelope means to surpass normal limits or attempt something viewed as radical or risky. It comes from the aeronautical use of envelope referring to performance limits that cannot be exceeded safely.