# Canary Islands medication safety and heat alerts

> Live situation record from CLSTR: https://clstr.news/situations/canary-islands-medication-safety-during-high-temperatures
> Updated: 2026-09-08T10:59:32.000Z. Sources: 7. Developments: 3.

Health authorities in the Canary Islands have issued alerts and guidance regarding the risks high temperatures pose to the storage and efficacy of medications. The Canary Islands Pharmacovigilance and Therapeutic Information Center and the Canary Islands Emergency Service (SUC) warned that summer heat can alter certain treatments and increase health risks.

Vulnerable populations, including children, the elderly, chronic patients, and dependent individuals, are noted to be at a higher risk for dehydration and related complications. Authorities highlighted that certain drugs—specifically those affecting renal function, electrolyte balance, hydration, or thermoregulation—require increased vigilance. Specific mentions include diuretics, laxatives, and antacids.

Official recommendations include strictly following package instructions, respecting refrigeration requirements, and avoiding exposing medicines to direct sunlight or vehicles. Health professionals advise that patients should not consume any medication that shows visible signs of alteration.

As extreme heat conditions persist, the Government of the Canary Islands has activated a pre-alert for high temperatures specifically for the islands of Gran Canaria and Fuerteventura, following analysis from the State Meteorological Agency. Authorities continue to recommend that elderly individuals, minors, and those with chronic illnesses avoid direct sun exposure during midday and maintain hydration.

## Timeline

### 2026-09-08: Heat advisories issued in Puerto Rico and Canary Islands

Heat advisories and pre-alerts have been issued in Puerto Rico and the Canary Islands (Gran Canaria and Fuerteventura) due to intense temperatures and high heat indices.

2 sources. https://clstr.news/cluster/heat-advisories-issued-in-puerto-rico-and-canary-islands

### 2026-08-21: Canary Islands health officials issue medication safety guidance for high temperatures

Health authorities in the Canary Islands advise careful medication storage and transport during high temperatures to protect vulnerable populations from heat-related complications.

3 sources. https://clstr.news/cluster/canary-islands-health-officials-issue-medication-safety-guidance-for-high-temperatures

### 2026-08-19: Canary Islands health authorities warn of heat risks to medication

Health authorities in the Canary Islands have warned that high summer temperatures can compromise medication safety and increase health risks for vulnerable populations.

2 sources. https://clstr.news/cluster/canary-islands-health-authorities-warn-of-heat-risks-to-medication

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Cite as: Canary Islands medication safety and heat alerts. CLSTR, https://clstr.news/situations/canary-islands-medication-safety-during-high-temperatures