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An image timed at 0815GMT Wednesday shows Karl (far left), Igor (centre) and Julia (far right)
Tropical Storm Karl is bearing down on Mexico, with two dangerous category four hurricanes - Igor and Julia - also sweeping in from the Atlantic.
Karl, packing maximum sustained winds of 65mph (100km/h), is close to the Mayan Riviera on Mexico's Yucatan peninsula.
Igor, said to be the season's most powerful hurricane, is moving west-north-west towards Bermuda.
Julia intensified to category four on Wednesday, with winds close to 135mph.
Karl was expected to hit the Yucatan peninsula at the Mayan ruins town of Tulum.
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Although Karl is now a relatively weak system, it is threatening to bring heavy rain. No evacuations have so far been ordered.
The Miami-based National Hurricane Center said there could be as much as 8in (20cm) of rain in affected areas in Mexico, as well as in parts of Belize and northern Guatemala.
"A storm surge is expected to produce some coastal flooding near and to the north of where the centre makes landfall," the NHC said.
Igor as seen from space on Mon and Tues. Video and commentary provided by Nasa
Karl may then head back out to open water and strengthen again.
At 0300GMT on Wednesday Igor was 605 miles east of the northern Leeward Islands.
Igor is not expected to make landfall for a several days but storm swells will affect Puerto Rico, the Virgin Islands, the Bahamas and the Leewards on Wednesday.
Igor's maximum winds have weakened slightly but are still at 145mph.
"Much more detail on Igor will be covered in the next few days, as it likely becomes a potential threat," the NHC said.
Julia rapidly intensified early on Wednesday but is not close to land.
This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.
An image timed at 0815GMT Wednesday shows Karl (far left), Igor (centre) and Julia (far right) Tropical Storm Karl is bearing down on Mexico, with two dangerous category four hurricanes - Igor and Julia - also sweeping in from the Atlantic.
Karl, packing maximum sustained winds of 65mph (100km/h), is close to the Mayan Riviera on Mexico's Yucatan peninsula.
Igor, said to be the season's most powerful hurricane, is moving west-north-west towards Bermuda.
Julia intensified to category four on Wednesday, with winds close to 135mph.
Karl was expected to hit the Yucatan peninsula at the Mayan ruins town of Tulum.
Related stories
Although Karl is now a relatively weak system, it is threatening to bring heavy rain. No evacuations have so far been ordered.
The Miami-based National Hurricane Center said there could be as much as 8in (20cm) of rain in affected areas in Mexico, as well as in parts of Belize and northern Guatemala.
"A storm surge is expected to produce some coastal flooding near and to the north of where the centre makes landfall," the NHC said.
Igor as seen from space on Mon and Tues. Video and commentary provided by Nasa
Karl may then head back out to open water and strengthen again.
At 0300GMT on Wednesday Igor was 605 miles east of the northern Leeward Islands.
Igor is not expected to make landfall for a several days but storm swells will affect Puerto Rico, the Virgin Islands, the Bahamas and the Leewards on Wednesday.
Igor's maximum winds have weakened slightly but are still at 145mph.
"Much more detail on Igor will be covered in the next few days, as it likely becomes a potential threat," the NHC said.
Julia rapidly intensified early on Wednesday but is not close to land.
This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.