1-mega-blaze 大火

Sydney rains: record rainfall brings flooding but puts out mega-blaze

2-flash flood 山洪爆发

About 100,000 homes are without power, and officials have warned flash flood could be life-threatening.

3-extinguish 扑灭，熄灭

The rains had extinguished more than 30 fires, calling it " the most positive news we've had in some time".

4-be prone to 易于遭受……，🈶做（坏事）的倾向

5-debris 碎片，残骸

Fire-hit areas can be particularly prone to flooding, and that fast-moving waters can carry large amount of debris.

6-keep off 避开，不靠近

The state emergency minister David Elliott urged Sydneysiders to help rescue services by taking warnings seriously, staying away from flooding and keeping off roads if possible.