Crude oil prices rose back to the US$60 a barrel level Wednesday amid concerns about U.S. supply disruptions as a tropical storm forced oil companies to evacuate rigs in the Gulf of Mexico. While parts of the oil market appear to be amply supplied, there is still concern about reliable and timely delivery, CSFB said in a report Wednesday. Light, sweet crude for August delivery was up 37 cents to US$59.96 a barrel on the New York Mercantile Exchange in electronic trading in Europe, after trading as high as US$60.13. Heating oil rose nearly 3 cents to US$1.7555 a gallon (3.8 liters) while gasoline was up more than 2 cents at US$1.7085. Tropical Storm Cindy forced at least 23 petroleum production platforms and six drilling rigs to be evacuated, interrupting more than 3 percent of the Gulf of Mexico's normal oil and natural gas production, The Associated Press reported.