LONDON  - Oil prices rose on Monday on news of stormy weather which could threaten energy facilities in the US Gulf of Mexico, and after fruitless talks between the US and crude producer Iran, traders said. However after heavy losses last week that were linked to fears of slowing global growth and lower demand, oil prices remained far below the record highs of about 147 dollars per barrel that were struck earlier this month. Brent North Sea crude for September delivery added 1.71 dollars to 131.90 dollars in morning London trade. New York's main contract, light sweet crude for August delivery, rose 1.62 dollars to 130.50 dollars a barrel. "Oil prices were up partially on the back of the weather concerns as we saw the first tropical storm of 2008 in the Atlantic," said Sucden analyst Michael Davies. The hurricane season, which began in June and lasts until the end of November, had been largely uneventful until now. "Tropical storm Dolly was heading for Mexico's Yucatan Peninsula and this has served as a reminder that there remains a threat to oil and gas facilities in the Gulf of Mexico while we remain in the hurricane season," added Davies. "However, at the moment the US National Hurricane Centre is expecting the storm to pose no immediate threat." The most hurricane-prone US region is the southeastern coastline, running from the states of North Carolina to Texas. Meanwhile, weekend talks in Geneva aimed at convincing crude producer Iran to halt its nuclear programme made little progress, dealers said. The US and other major powers suspect Iran's nuclear drive aims to make weapons, but Tehran insists its objective is only energy production. "The weekend meeting involving Iran really didn't resolve the issues surrounding the nuclear programme so the geopolitical risk premium has increased," said Commonwealth Bank of Australia strategist David Moore. "I think that was the factor behind the lift in prices," he said from Sydney. US Secretary of State Condoleezza Rice upped the pressure on Tehran on Monday, warning Iran had two weeks to respond seriously to an international offer to halt its sensitive nuclear work or face further "punitive measures." The Geneva meeting sent a "very strong message to the Iranians that they can't go and stall ... and that they have to make a decision," Rice told reporters travelling with her to the Middle East. The Islamic republic is the world's fourth-biggest producer of crude oil, and tension over its nuclear effort has helped push prices to record highs recently. Washington's decision to send Under Secretary of State William Burns to the talks marked a major US policy shift, which has not had diplomatic relations with Iran since 1980. Analysts have said the shift was one of the factors that helped to explain last week's plunge in oil prices, which tumbled by more than $16. Worries that a US-led world economic slowdown would hit energy demand were likely the key reason for the decline, they added. World oil prices remain high by historical standards, having traded as low as under ten dollars per barrel in the late 1990s. They rocketed past 100 dollars at the start of 2008. The elevated cost of black gold continues to fan fears of high inflation and slower economic expansion.