As temperatures climb across California and heat advisories become more common, Dignity Health is urging residents to recognize the serious impact extreme heat can potentially have on the heart, particularly for older adults and those living with cardiovascular disease.

When temperatures soar, the heart must work harder to keep the body cool. For some individuals, that added stress could increase the risk of heat-related illness, heart attack, stroke and other cardiovascular complications.

“Many people think of heat exhaustion and dehydration during a heat wave, but fewer realize that extreme heat can place significant strain on the heart,” shared Dr. Kevin Ariani, cardiologist at Dignity Health Northridge Hospital. “As the body works to cool itself, the heart pumps harder and faster. For individuals with underlying heart conditions, that additional workload can become dangerous.”

High temperatures can potentially increase heart rate, reduce blood volume through dehydration, and disrupt electrolyte levels that help regulate normal heart function. These factors may place vulnerable individuals at greater risk for serious health complications.

Those at highest risk may include:

■ Adults age 65 and older

■ Individuals with heart disease, heart failure, high blood pressure or a history of stroke

■ People taking medications such as diuretics, beta-blockers or ACE inhibitors

■ Outdoor workers, athletes and first responders who spend extended periods in the heat

Dignity Health encourages Californians to take the following steps to support their safety:

■ Stay hydrated by drinking water throughout the day, even before feeling thirsty

■ Seek air-conditioned environments whenever possible

■ Limit strenuous outdoor activities during peak heat hours, typically between 10 a.m. and 4 p.m.

■ Wear lightweight, light-colored clothing and take frequent breaks in shaded areas

■ Talk with your health care provider about how heat may affect medications or existing health conditions

■ Check on older family members, neighbors and others who may be more vulnerable to heat-related illness

■ Residents should also be aware of warning signs that could require immediate attention. Symptoms such as dizziness, nausea, rapid heartbeat, confusion, fainting or difficulty breathing may indicate a serious heat-related emergency.

“Extreme heat is more than a seasonal inconvenience – it can also be a health threat,” Ariani said. “By staying hydrated, limiting heat exposure and recognizing the warning signs early, people may significantly reduce their risk and protect their heart health.”

For more information about heat-related illness and heart health, visit DignityHealth.org and CommonSpirit.org.