National Weather Service issues a winter storm warning for more than 100 million Americans living from east Texas to the East Coast state of Maryland.
Historic winter storm brings lower temperatures to Houston than in parts of Alaska, leaving millions of Texans without power and spinning killer tornadoes into southeastern US.
More than 7,600 people, many of them rescued from flooded villages, were taking shelter in evacuation centres.
A snowstorm hit the US east coast late on Wednesday, leaving some areas buried under more than metre of powder.
Fiji has issued a nationwide lockdown and declared a state of natural disaster as Cyclone Yasa barrels towards the island nation.
Central American authorities have confirmed more than 30 deaths with the majority of the victims in Nicaragua. The US National Hurricane Center has warned of "life-threatening flash flooding" due to heavy rainfall from Iota's tail.
Iota is about 475 km east of Isla De Providencia Colombia and expected to become a major hurricane as it approaches Central America.
Eta left a trail of destruction through Honduras and Guatemala, eventually weakening to a tropical storm after making landfall in Nicaragua.
Forecasters expect Eta to become a hurricane and is predicted to be nearing the Nicaraguan coast early Tuesday.
UN Office for Disaster Risk Reduction accuses governments of not doing enough to prevent climate hazards and calls for better preparation for looming disasters.
Mexico's civil defence department says strong winds whipped Cancun, one of Mexico’s most popular tourist destinations, causing major destruction with no immediate reports of deaths.
Mediterranean cyclone Ianos, an unusual phenomenon also known as a medicane lashes islands in western Greece, bringing heavy rainfall and power cuts.
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