Extreme high temperatures double mental health admissions risk for young Australians, study finds

Extreme high temperatures significantly increase the risk of mental health hospital admissions among young Australians, according to a study published by the University of Sydney. The research analyzed 720,000 hospital admissions from 2001 to 2022 in New South Wales, revealing that young people aged up to 24 face a doubled risk of being admitted for mental health conditions during warmer months.

Impact of Extreme Temperatures on Mental Health

The study found that extreme heat correlates with a 6% to 7.7% increase in heat-related hospital admissions by the end of the century. Dr. Wen-Qiang He, the lead author, stated, “As temperatures increase, we see admissions for these younger populations increase significantly.” The risk is notably higher during the warm season, doubling from October to March.

Researchers noted that the risk triples during cooler months when daily temperatures hit the highest 1%. This alarming trend indicates that the climate crisis exacerbates the declining mental health of youth, particularly with conditions such as schizophrenia, depression, and self-harm.

Potential Causes of Increased Admissions

The study did not delve into the reasons for the correlation between heat and mental health admissions. However, other research suggests that higher temperatures can directly affect brain function, leading to increased stress and anxiety. Additionally, unexpected temperature spikes may disrupt sleep patterns and emotional stability.

• Risk factors identified:
• Higher impulsivity and risk-taking behavior
• Increased substance use as a coping mechanism
• Disruption of sleep, a known risk factor for suicidal ideation

Dr. Cybele Dey, a co-author of the research, emphasized the urgency of understanding this link, stating, “There has to be a lot going wrong for a person to be admitted.” The data indicates little lag between temperature spikes and hospital admissions, suggesting a direct physiological response to heat.

Implications for Mental Health Policy

Dr. Hasini Gunasiri from the youth mental health research institute Orygen highlighted the significant implications of these findings for mental health care. She noted that current heat-health policies predominantly focus on physical health outcomes and often overlook mental health impacts.

“These findings suggest that mental health should also be considered when planning for extreme temperatures, especially for children and young people,” Gunasiri stated. Incorporating mental health messaging into heat warnings could enhance awareness among clinicians and families regarding the potential mental health impacts of heat.