Tropical Storm Humberto is forecast to become a major hurricane this weekend and a second system — likely to become Imelda — is a possible threat to Florida or other parts of the U.S. coast.

A fast-moving Hurricane Gabrielle is expected to bring heavy rain, high winds and a storm surge to the Azores islands. The National Hurricane Center in Miami says a hurricane warning is in effect

Following a three-week lull in the Atlantic hurricane season, a flurry of activity has kicked off the closeout of the month of September.

Gabrielle has strengthened into a major hurricane in the Atlantic Ocean but was forecast to remain far from land.