US weather: Record-shattering cold reaches as far south as Florida; parts of Niagara Falls freeze over

A record-shattering arctic cold in the United States has reached as far south as Florida, with freeze warnings in place from Texas to the Atlantic Coast and the north-east of the country facing another cold wave at the end of the week, forecasters said.

The brink of the Horseshoe Falls in Niagara Falls turns to
icicles as the area is hit with a cold blast.

Temperatures were from 11 to 17 degrees Celsius below normal across the US east of the Rocky Mountains, with only southern Florida untouched by the arctic blast.

"That degree of cold will be with us until tomorrow," National Weather Service meteorologist Brian Hurley said.

"Tuesday morning, we're looking at temperatures with very high probability of record lows."

Along Alabama's Gulf Coast, the temperature in the city of Mobile could hit a low of -9C overnight.

Read the ABC News story - “US weather: Record-shattering cold reaches as far south as Florida; parts of Niagara Falls freeze over.”

Humanity has entered a global warming minefield, climate scientists say

This year’s deadly hurricanes, record-shattering firestorms and severe drought are linked to global warming, and the prospect of more unpleasant surprises seems likely, climate experts warn.

Three hurricanes at once — Irma, Katia and Jose
 — seen from a satellite in early September.

“What we're seeing is the veritable tip of the iceberg,” says Michael Mann, distinguished professor of atmospheric science and director of the Earth Systems Science Center at Penn State University.

“If we continue on the path that we're on,” he says, “there's no reason not to expect that we will see even more intense hurricanes and more extreme weather events of the sort we're already starting to see — unprecedented flooding events [and] unprecedented heat waves, droughts and wildfire."

Just in the last few years, Mann points out, researchers have measured record global ocean temperatures, which have led to the strongest hurricane in the Northern Hemisphere, Hurricane Patricia; the strongest hurricane in the Southern Hemisphere, Hurricane Winston; and the strongest storm ever recorded in the open Atlantic, Hurricane Irma.

Read the PRI story by Adam Wernick - “Humanity has entered a global warming minefield, climate scientists say.”