Bloomberg: The four major Atlantic hurricanes that spun toward the Caribbean in the past month were fueled by record warm seas and formed in an unprecedented 20 days. With 10 weeks left in the hurricane season, more may be coming. The storms that were born off west Africa gathered strength by absorbing the ocean’s heat and swelled into Category 4-level hurricanes on the 5-step Saffir-Simpson scale. While none hit land at full speed, each packed winds of at least 131 miles (210 kilometers) an …