When the sun is out after a long winter, every one loves it. But not the people of Canary Islands. Tourists there are being warned about the "unusually high risk" of UV rays this week. The Ministry of Health for this holiday destination has urged both, residents and visitors to take extra precautions and preventative measures to limit the impact of sun exposure over their body and skin.

The Ministry observed Aemet, Spain's national weather agency for the forecast which showed higher than normal UV or ultraviolet radiation levels in the region. It is in this backdrop that everyone in the region are requested to be extra careful when they are out in the sun. UV levels are set to reach 7, which is a 'high risk' in La Palma, El Hierro, La Gomera and Gran Canaria. Other regions like Tenerife, Fuerteventura and Lanzarote are expected to reach a level 6, which is also classed as 'high risk'.

UV Index Explained

As per the World Health Organization (WHO), a UV index is a measure of the level of UV radiation, which ranges from zero upward. The higher the UVI, the greater potential for damage to skin and eye and the less time it takes for harm to occur, notes WHO.

The range 1 to 2 represents a low risk, 2 to 5 is moderate, 6 to 7 is at high risk, 8 to 10 is at very high and anything over 11 is extremely risky for anyone to stay out.

UV radiation levels fluctuate throughout the day, with the highest values occurring during the four-hour period around solar noon. The reported UV Index (UVI) typically reflects this daily peak. Depending on geographic location and the use of daylight saving time, solar noon falls between 12 p.m. and 2 p.m. In some countries, sun protection advisories are issued when UV levels are expected to reach 3 or higher, as exposure at these levels increases the risk of skin damage, making protective measures essential.

What happens to you when you are out in sun for too long?

While sun bathing is good, being out in the sun when the UVI indicates a high or very high risk, may cause you health concerns. It can lead to sunburn, premature skin aging, incresed risk of skin cancer, eye damage and in severe cases, heat related disease.

Sunburn

It is one of the most common skin injury which happens when there is excess exposure to UV radiation from the sun. This happens when the UV radiation directly damages the DNA skin cells. These damaged cells die and shed, this is why people experience peeling after getting a sunburn.

Dehydration

This is also a common occurrence when your body loses too many fluids or electrolytes. It can also interfere with your normal body functions. You may feel dehydrated, especially when you are out in the sun, but not well hydrated. The most common symptoms are dizziness, fatigue and headache on hot days.

Hyponatremia

This is an electrolyte disorder in which your body experiences low sodium in blood. The symptoms could lead to nausea, confusion and even weakness. There are extreme cases when one may have seizures, slip into coma or die.

Heat Exhaustion

This is one of the most common consequence of being out under the hot sun. Dehydration with prolonged heat exposure can lead to heat exhaustion.

Heatstroke

When you are out under the sun and your body's core temperature cross 104°, heatstroke may occur. This is also known as sunstroke. As per the Centers for Disease Control and Prevention (CDC), it causes more than 600 deaths each year in the United States.

Indonesia’s Central Kalimantan and Sumatra are shrouded in thick orange-yellow smog as wildfires rage across the regions. The smoke has spread across Southeast Asia, obscuring Singapore’s skyline, reaching the Philippines and forcing school closures in parts of Malaysia.

Indonesia’s Air Pollution Standard Index (ISPU) exceeded 1,200 on Wednesday, more than four times the “hazardous” threshold of 300, according to Environment Ministry data.

Fueled by El Niño-related dry conditions, the country is experiencing its most intense wildfire season in 11 years since mid-July. Authorities have recorded more than 280,000 respiratory problems in haze-affected regions since August 18, as fires burned through hundreds of thousands of hectares across Borneo and Sumatra.

Indonesia Plans Dry-Ice Trial To Reduce Haze

Also Read: Landmark Study Links Air Pollution To Higher Hospital Admissions For Cancers & Mental Health Disorders: Lancet

Indonesia plans to deploy 1.5 tons of dry ice, the solid form of carbon dioxide, over South Sumatra using Cessna aircraft to reduce the haze. The trial will focus on the Palembang area, with the approach potentially extended to other regions if successful, BBC reported.

Dry ice can cool the air and encourage cloud formation under suitable atmospheric conditions. However, its effectiveness in reducing wildfire haze will depend on local weather conditions and the method used.

Toxic Haze Spreads Across Southeast Asia

The smoke has reached Singapore, Malaysia, East Timor and the Philippines. Singapore’s National Environment Agency reported its highest air pollution warning level in the western part of the country on Wednesday. Fine particulate pollution also exceeded the World Health Organization’s recommended annual average exposure level, BBC reported.

Singapore has introduced subsidies for haze-related medical treatment and begun distributing N95 masks to eligible residents during periods of very unhealthy air pollution.

How Can Wildfire Smoke Affect Your Health?

Read More: Delhi Air Pollution Is Back: What Days Of Poor AQI Can Do to Your Lungs

A 2025 study published in Epidemiology found that the effects of wildfire smoke exposure on the heart and lungs may persist for up to three months after the smoke clears. Higher smoke pollution levels were also associated with an increased risk of health problems.

Why Is Wildfire Smoke Harmful?

Wildfire smoke contains fine particulate matter called PM2.5, which can penetrate deep into the lungs. Some particles can enter the bloodstream and trigger inflammation.

Smoke may also contain toxic substances released by burning plastics, homes, vehicles, electronics and industrial materials.

Health Risks Of Wildfire Smoke

Prolonged exposure can affect several aspects of health:

• Lung health: Coughing, reduced lung function, worsening asthma and COPD, and other respiratory problems.
• Heart health: Fine particles can contribute to cardiovascular stress and heart-related complications.
• Brain health: Exposure may be associated with headaches and other neurological effects.
• Mental health: Wildfires, displacement and evacuations can contribute to anxiety, depression and post-traumatic stress disorder (PTSD).
• Cancer risk: Research is investigating possible links with lung, breast, colorectal and bladder cancers, as well as certain blood cancers. Evidence remains limited, and these associations do not establish direct causation.

Children, older adults and people with existing heart or lung conditions are particularly vulnerable.

How To Protect Yourself From Wildfire Smoke

Even after visible smoke clears, harmful particles may remain in the air. To reduce exposure:

• Check air quality before going outdoors.
• Stay indoors and avoid strenuous outdoor activity when pollution is high.
• Use a HEPA air purifier to reduce indoor airborne particles.
• Wear a well-fitted N95 mask if going outdoors is unavoidable.
• Keep windows and doors closed when smoke levels are high.
• Continue prescribed medications for asthma or heart disease.
• Seek medical care for persistent or worsening cough, chest pain or breathlessness.

India's Union Health Ministry has been asked to examine concerns over the safety and quality of coronary stents.

This comes after three models of drug-eluting stents (DES) made by India-based medical device company, Meril Life Sciences Pvt. Ltd, were reportedly withdrawn in Sri Lanka over quality issues.

India-Made Coronary Stent Under Scrutiny

Sri Lanka drug regulatory body, National Medicines Regulatory Authority (NMRA), reportedly issued the instructions for withdrawal of these stents in June 2026. The Cabinet Secretariat urged the Health Ministry to look into the concerns on October 5, after a representation by Rajya Sabha member Ajeet Madhav Gopchade who is also a medical doctor.

According to Sri Lanka Mirror, the concerns include improper stent positioning, stent dislodgement, acute stent thrombosis, and failure of the devices to expand adequately after implantation.

Stent thrombosis occurs when a blood clot forms inside the implanted stent, potentially blocking blood flow to the heart. Acute stent thrombosis is particularly serious because it can lead to a heart attack and requires urgent medical attention.

These complications can affect the success of a procedure and may put patients' lives at risk.

These issues were identified after an investigation was conducted by the Medical Device Evaluation Committee (MDEC) of the NMRA. The regulatory body also said that these defects necessitate the use of supplementary devices, which resulted in wastage of precious time and unnecessary added expenses.

In his representation, Gopchade addresses the media reports about the withdrawal of three stent models in Sri Lanka.

Need For Better Monitoring After Stent Implantation

Also read: Mammogram May Spot Hidden Heart Risk That Doctors Miss In Women

Gopchade urged the government to assess whether India's regulatory system needs further strengthening to address risks that come after coronary stent implantation.

In his letter dated October 5, he said the reported developments required closer scrutiny to protect patients. “These reports highlight that Indian-patient-safety issues that India needs to examine carefully and address proactively,” he said in the representation, according to The Economic Times.

He called for rigorous device testing, clinical decision-making, and monitoring of complications after stent implantation. He said that safety checks should not end once a medical device has received regulatory approval.

Gopchade called for better documentation to ensure that stents are used only when medically indicated, and that alternative treatments are considered first.

He also proposed stronger monitoring of the performance of medical devices after they enter routine clinical use. Such monitoring can help spot complications that may not have been apparent during initial testing.

Gopchade further urged the government to establish a mechanism for reviewing safety alerts, recalls and withdrawals issued by foreign regulators effectively.

This would help authorities assess whether a device flagged overseas is also being marketed or used in India and whether investigation is needed.

What Are Coronary Stents?

Coronary stents are small, mesh-like tubes that are placed inside narrowed or blocked coronary arteries to help restore blood flow to the heart. They are used during angioplasty, a procedure that opens blocked arteries in people with coronary artery disease.

Drug-eluting stents release medication over time to reduce the risk of the artery narrowing again. While these devices can help restore blood flow and improve cardiovascular health, their safety depends on their quality, correct placement, and post-procedure care.

People who have had COVID-19 may be more likely to need allergy medications months after initial infection, according to a large Japanese study.

The study analysed health records of more than 778,000 people, suggesting that the effects of COVID-19 may extend beyond the respiratory illness and could be related to immune function after infection.

The study, published in BMC Public Health, examined whether people diagnosed with COVID-19 were more likely to receive new prescriptions for allergy medications than individuals who had not contracted the infection.

Researchers analysed health insurance records for 778,362 people diagnosed with COVID-19 and compared them to a group of individuals who were not infected.

They tracked new prescriptions for four categories of allergy medications, including antihistamines, leukotriene receptor antagonists, eye drops for allergic conditions and nasal sprays used to treat rhinitis.

Over a median follow-up period of seven months, people who had COVID-19 were 21% more likely to receive a new prescription for allergy medication than those in the comparison group.

The association was stronger among older adults and people with pre-existing health conditions. The researchers also found that elevated prescription rates remained detectable beyond one year after infection in a few high-risk groups.

However, the study merely identifies an association between infection and subsequent use of allergy medications and does not establish a causal link.

How Could COVID-19 Affect Allergy Risk?

Also read: XFG Variant In Spain: COVID-19 Cases Rise Amid Respiratory Infection Surge

Allergies occur when the immune system overreacts to substances that are usually harmless, like pollen, dust mites or certain foods. This response can trigger symptoms including sneezing, itching, a runny nose, skin rashes and watery eyes.

Antihistamines work by blocking the effects of histamine, a chemical that is released during these allergic reactions. Leukotriene receptor antagonists target inflammatory elements involved in conditions like asthma and allergic rhinitis.

Researchers believe that infections caused by respiratory viruses can sometimes alter immune responses, affecting processes involved in allergic inflammation.

COVID-19 has been known to cause changes in immune system that can last beyond the initial illness. Damage to the lining of the respiratory tract and changes in inflammatory response could influence how the body responds to allergens.

However, these mechanisms were not directly established by the Japanese study. The researchers used prescription records rather than laboratory tests to confirm newly developed allergic diseases.

Who Is At Greater Risk?

Also read: Long COVID: Mouth And Lung Bacteria May Offer Clues

The association between COVID-19 and new allergy medication prescriptions was more pronounced among people aged 65 and older.

In this group, the rate of new prescriptions was 33% higher among those who had contracted COVID-19 than among their matched counterparts. Among people with substantial pre-existing illnesses, the rate was 35% higher.

The researchers also found that it lasted more than one year in these groups, although it gradually weakened over time.

These findings suggest that older adults and people managing multiple health conditions may warrant closer attention to new symptoms following COVID-19.

The study's large sample size provides useful evidence about patterns in allergy medication use after COVID-19. But a prescription does not always mean a new allergy diagnosis. Some medications included in the analysis can be prescribed for conditions other than allergies, and people recovering from COVID-19 may have more opportunities to consult doctors or receive prescriptions.

The findings also come from Japan and may not apply equally to populations with different healthcare systems, demographics or patterns of medication use. Further research is needed to determine whether COVID-19 contributes to the development of new allergic conditions.