A Florida man who became lost while walking along a nature trail in Florida was found dead on Sunday.

Ronald Bernard Fernandez, 61, of Sebring, was walking along a nature trail at Sun ‘n Lake of Sebring when he called Highlands County Sheriff's Office dispatchers to report that he had gotten lost, according to a Highlands County Sheriff's Office news release.

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Fernandez called 911 several times, telling dispatchers his cellphone service kept disconnecting and that he wanted to conserve his phone’s battery. Rescue crews used pings from his cellphone while trying to locate him, but they showed Fernandez was moving despite being told to stay in one spot.

The release said a search involving air units from Highlands and Polk counties, more than a dozen deputies and multiple vehicles from multiple law enforcement agencies ended after a Polk County helicopter found Fernandez face-down in shallow water.

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Fernandez’s cause of death has yet to be determined by a medical examiner, but the sheriff’s office cites heat, humidity and dehydration as possible factors in his death.

Read more at the Highlands County Sheriff's Office.