on august 31, 2007 the national meteorological service in mexico decreed zone of alert from lagunas de chacahua, oaxaca to cabo corrientes, jalisco. it requested the public to take precautions before the possible coming of rain, intense winds and storm surges in the south and southwestern coasts of mexico. the ministry of education of guerrero canceled classes at all schools in the evening and close the port navigation. faced with the prospect of henriette strengthening, the head of the harbor bay in acapulco stopped all travel for small craft and coastal fisheries. also blue and yellow flags were raised as a preventive measure for swimmers. on september 4, the port of mazatlán, sinaloa had to be shut down to all navigation due to the inclement weather produced by the hurricane. the port authority reported that henriette produced waves surpassing 4 meters (13 ft) in height. the carnival pride cruise scheduled to arrive at the port had to be diverted out to sea as a result of the port's closure. in the city itself, school was suspended for two days, and officials stated that approximately 600 famiilies might have to be evacuated. further north, the port of topolobampo, sinaloa was also closed due to henriette's threat, and 20 families were evacuated from their homes in an ejido.