The association between short-term temperature variability and mortality in Virginia.

Area of Science:

• Environmental Health
• Epidemiology
• Climate Science

Background:

• Short-term temperature variability is a growing concern for public health.
• Understanding the link between daily temperature fluctuations and mortality is crucial for risk assessment.

Purpose of the Study:

• To investigate the relationship between day-to-day temperature changes and total mortality.
• To analyze the lagged effects of temperature variability on mortality across different regions in Virginia.

Main Methods:

• Utilized airport observations to calculate daily maximum temperature changes.
• Employed distributed lag non-linear models to assess mortality risk over a 28-day period.
• Controlled for air quality, temporal trends, and other confounding factors.

Main Results:

• Significant increases in mortality risk were observed following large daily temperature declines in three of four locations.
• Short-term temperature increases were also linked to higher mortality, with immediate effects observed in some areas.
• Lagged mortality effects from temperature declines persisted for up to 25 days, while warming impacts were often more immediate.

Conclusions:

• Short-term temperature variability, both increases and decreases, poses a significant risk to mortality.
• The timing and magnitude of mortality impacts differ between warming and cooling events, influenced by season.
• Findings can inform public health strategies for mitigating risks associated with temperature fluctuations.