Weather forecasters have predicted Hurricane Emily will hover over Mexico for the next three days bringing strong winds and floods to some of the country's top holidays resorts.
The PA WeatherCentre has warned Emily could increase in intensity from a category four hurricane to category five - the maximum - within hours and stay on the south eastern side of the country until Wednesday.
Forecaster Brendan Jones said: "It is clearly a worry for that part of the Gulf of Mexico because it is a populated resort area.
"Currently Emily is moving towards Merida, a large town and is likely to remain an intense force in the area for Monday and Tuesday, weakening by Wednesday, and by Thursday she should be below hurricane strength."
Merida, also known as the White City because of its white 16th century Spanish architecture, is an established tourist destination with many hotels and restaurants.
Mr Jones said: "Winds could reach as high as 160mph causing some structural damage. At the moment Emily is south of the Cayman Islands and will be moving north for the next 24 hours but even at this stage it is possible for her to change direction.
"I doubt she will be the last of the season, it can last until November but July and August are the peak months," he added.
The first storm of the season was Hurricane Arlene, a category two. She blew into Florida early last month, causing 20ft waves on the coast.
Bret, a tropical depression brought moderate winds of 40mph to Western Mexico on June 29.
Cindy reached 70mph and produced a lot of rain and strong winds across Texas from July 3 to 6.
And Dennis, a category four, peaked with winds of 150mph in Jamaica on July 11.
After Emily, Franklin will be next, although Mr Boulton said it was too early to predict where or when it could strike.