"Catastrophic" flooding in the US state of Texas is only expected to worsen in coming days as waters rise following a storm of historic proportions. 

Catastrophic 灾难性的

Worsen 变坏

flood 具体的洪水

flooding 强调动作

US state 连读，依靠语境和"s"音长度判断是否连读

be expected to do 将要，有预期的，only表示强调一定

in coming days 在随后的几天

waters 水域

Proportions  规模

historic proportions 历史规模


A record 30 inches of rain has already fallen on the city of Houston in the wake of Hurricane Harvey, turning roads into rivers. 

In the wake of: 尾随其后，after


But forecasters say that number could nearly double later this week. 

forecaster 天气预报员

but不会重读，but后面的词会被重读


On Monday President Donald Trump also approved an emergency declaration for neighboring Louisiana.

Emergency declaration 宣布紧急状态