Authorities and family are concerned about a 35-year-old Australian man missing in Mexico. According to multiple Australian outlets, the man has not made contact with his family or friends for almost a month, prompting fears for his wellbeing. The reports note that his absence has lasted nearly a month and that he remains uncontactable via usual communication channels. While the outlets agree on the core details—that he is Australian, is in Mexico, and has been unreachable for almost a month—they do not provide further information in the provided text about the circumstances of his disappearance, his last known location, or whether police or consular services have been notified. The situation is presented as one where family concern is rising due to the length of time without contact. Further developments would typically depend on additional inquiries, including attempts to locate him and determine whether there is any immediate risk or explanation for the lack of communication.