TEXAS, USA — Winter has arrived in Texas. If the freezing temperatures this weekend and into Monday morning weren't evidence enough, just get ready for this upcoming weekend: Arctic air will bring the possibility of a wintry mix, icy roads and temps at or below freezing for around 60 hours.

A geomagnetic storm occurs when high-energy plasma and magnetic fields ejected from the sun interact with Earth's magnetic field.

The attack knocked out heating to more than 5,600 apartment buildings in the capital, Kyiv Mayor Vitali Klitschko said. Nearly 80% of the affected buildings had recently had their heating supply restored after a major Russian barrage on Jan.