Vermont capital cut off by floodwaters as dam threatens to overflow

Deadly deluge has saturated parts of New England and New York, while the south and west are under worsening heatwave

A Vermont reservoir on Tuesday risked overwhelming a dam protecting the state's capital and exacerbating catastrophic" flooding that has already shut roadways leading out of town and trapped some residents in their homes.

The dangerous storm that has dumped up to two months' worth of rain on Vermont in two days has cut off the capital of Montpelier from the rest of the state while the deadly deluge that saturated parts of New England and New York continues to spark flash flood warnings.