UPDATE: Volcano grounds air travel - WKOW 27: Madison, WI Breaking News, Weather and Sports

UPDATE: Volcano grounds air travel

LONDON (WKOW) -- Air traffic remains grounded across much of Europe, as the ash plume from Iceland's volcano continues to disrupt travel, and air traffic authorities extend no-fly restrictions.

British Airways canceled all its flights to and from the United Kingdom Sunday, and airspace in northern France is closed until Monday morning.

A geologist in Iceland says the volcanic activity was "quite vigorous" overnight and shows no sign of abating. One meteorologist predicts the jet stream will continue carrying dust to Europe through next Wednesday.

Aviation experts say the volcanic plume has caused the worst travel disruption Europe has ever seen, except during wars.

It's also a potential health threat. Authorities in the U.K. and Iceland are telling people with respiratory problems to stay indoors, and the World Health Organization says Europeans shouldn't go outdoors if ash starts settling.

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