News - World: An already rain-soaked New England was bracing for more downpours on Sunday with four people already dead, while the National Weather Service (NWS) warned of extreme heat for nearly a quarter of the US population.

The NWS said parts of New England and the Mid-Atlantic areas will get hit with storms "capable of producing torrential rainfall" ahead of a cold front approaching from the west. The areas under risk include major cities like New York, Boston and Philadelphia.

New York Governor Kathy Hochul urged residents in her state to avoid travel until the rain passes, saying, "Your car can go from a place of safety to a place of death" if swept up in a flash flood.

The NWS said the northeast could experience impassable roadways, tornadoes and even mudslides in some areas of higher terrain.

At least four people were swept away and killed by a flash flood on Saturday in Upper Makefield Township in Pennsylvania, about 20 miles northeast of Philadelphia, local police said in a written statement.

Rescuers said Sunday they are searching for another three people, including a nine-month old boy, his two-year-old sister and also an adult woman.

Flooding inundated the northeast in recent days, with Vermont in particular reporting catastrophic flooding in its capital Montpelier, which was under a flash flood warning again on Sunday.

Outside of the northeast, the NWS forecast heavy rains for some stretches of the central plains and the middle Mississippi Valley, along with eastern Texas, some portions of Arkansas and Louisiana and parts of the Gulf Coast.

Heat warnings for a quarter of Americans

On the other hand, heat warnings spread from the Pacific northwest, down through California, through the Southwest and into the Deep South and Florida.

Temperatures of over 46 degrees Celsius (115 degrees Fahrenheit) are forecast for areas of southern California's high desert, along with Arizona and Nevada.

The NWS said widespread record-breaking high temperatures are likely to be recorded across the Southwest, in the western Gulf Coast and also in south Florida.

Temperatures between 37 and 43 degrees Celsius (100-110 degrees Fahrenheit) are forecast for portions of the Pacific Northwest. That could be particularly dangerous for an area unaccustomed to excessive heat, as many homes do not have central air conditioning, according to data from the US Census Bureau.

The extreme heat in the US, with warnings for over 80 million people, is being caused by a mass of high pressure air sitting like a dome atop impacted areas, which blocks any rain storms from moving in to provide cooler weather, the NWS said.

Scientists say fossil fuel-driven climate change is heralding more extreme weather like that seen in the US in recent days, warning that the world needs to drastically cut carbon emissions to prevent its catastrophic effects.

Source: Reuters