HAMNET Report 19th April 2026

By 16 April at 03:00 UTC, Tropical Cyclone SINLAKU’s centre was located over the ocean approximately 144 km west of Alamagan Island, with maximum sustained winds of 185 km/h.

According to the Federal Emergency Management Agency (FEMA), a total of 1 080 people remain evacuated in 16 evacuation centres, 320 in the Northern Mariana Islands and 760 in Guam. Additionally, FEMA and media report power and water outages, particularly on Guam, Saipan, Rota and Tinian.

Over the next 48 hours, heavy to very heavy rainfall, strong winds and storm surges are forecast for most of the Northern Mariana Islands and Guam. A Typhoon Warning remains in effect for Rota, Tinian, Saipan, Alamagan, Pagan and Agrihan islands.

The US Coast Guard News advised mariners of outages in VHF radio communications coverage in the vicinity of Guam, Rota, Saipan and surrounding areas in the Commonwealth of the Northern Mariana Islands on Wednesday.

Mariners should anticipate reduced reception and transmission capabilities that may potentially impact distress and safety communications.

Remote fixed facility tower outages have impacted coverage around Guam, Rota, and Saipan, extending from coastal areas to 20 nautical miles offshore.

Joint Rescue Coordination Center Honolulu watch-standers issued a safety marine information broadcast and SafetyNET broadcast informing mariners of outages.

Meanwhile, Malaysia, Indonesia, Panama and Haiti are also all experiencing severe weather and flooding.

And you can take it from me that winter officially started on Friday the 17th in the Western Cape. A powerful cold front arrived in the early morning, with lots of rain, with a large amount of cold Antarctic air behind it, resulting in snow being experienced in the Matroosberg mountains, and, according to snowreport.co.za, forecast for the peaks of Franschoek, Paarl, Worcester, De Doorns, Montagu, Ceres, Tulbagh, the Koue Bokkeveld and the Cedarberg, as well as the Swartberg mountains, for the weekend. Time for the thermal underwear indeed!

Meanwhile, the measles epidemic in children in Bangladesh is spreading, with 19161 cases hospitalized and 166 deaths reported. 22 million doses of vaccine are being distributed, and 943000 children under the age of 5 have been immunized so far. Vaccinate your children, people!

For those of you still suffering from the heat trapped inside your closed car parked somewhere, you’ll be excited to hear that a transparent radiative cooling film technology that dissipates heat directly to the outside without consuming electricity has been developed to reduce vehicle overheating during summer. The technology was validated through real-vehicle experiments conducted under diverse conditions—including different countries, seasons, and both parking and driving scenarios—and demonstrated the ability to lower cabin temperatures by up to 6.1°C and reduce cooling energy consumption by more than 20%.

The website phys.org says that Seoul National University College of Engineering announced that a research team has designed and fabricated a large-area Scalable Transparent Radiative Cooling (STRC) film applicable to vehicle windows. Through real-vehicle evaluations conducted under various climatic and driving conditions, the team demonstrated both energy-saving and carbon reduction effects.

This research was published online on February 4 in the journal Energy & Environmental Science.

Vehicles exposed to solar radiation in summer experience rapid increases in cabin temperature, resulting in substantial cooling energy consumption. Conventional automotive Low-E coatings and tinting films can partially block incoming solar radiation but fail to dissipate effectively heat already accumulated inside the vehicle, thereby limiting their cooling performance.

Radiative cooling technology, which has attracted attention as an alternative, simultaneously blocks incoming solar energy and emits internal heat to the outside, enabling passive cooling without electricity. However, most previously developed radiative cooling materials are opaque, making them unsuitable for application to vehicle windows, which are the primary entry points for heat.

To overcome this limitation, the research team developed a large-area transparent radiative cooling film with a multilayer structure that maintains over 70% visible light transmittance, reflects near-infrared solar radiation, and emits heat from the vehicle interior in the mid-infrared range. This film suppresses temperature rise inside the vehicle without consuming electrical energy and reduces the time required to reach thermal comfort, thereby minimizing energy consumption in electric vehicles.

Real-vehicle experiments conducted across different climatic regions—including Korea, the United States, and Pakistan—and under varying conditions such as summer and winter, as well as parking and driving scenarios, confirmed that vehicles equipped with the STRC film consistently maintained lower cabin temperatures under all conditions.

And in bad news for the vapers of the world, phys.org also reports that a study published in Analytical and Bioanalytical Chemistry by University of Technology Sydney (UTS) researchers showed that even short-term vaping at exposure levels below typical daily human use resulted in measurable accumulation of toxic metals in lung tissue—including lead, copper and nickel.

Lead researcher Dr. Dayanne Bordin, a lecturer in analytical chemistry, said the pre-clinical study provides the first evidence that e-cigarette aerosols include metal-containing (organometallic) species, including those associated with tin and mercury—forms that are often more bioavailable and biologically reactive than inorganic metals.

“From a risk perspective, the findings reveal under-recognized hazards associated with vaping,” she said.

“Metal emissions and their biological effects are rarely incorporated into current safety assessments or public understanding. Unlike cigarettes, which are relatively consistent products, e-cigarettes and devices are often manufactured with poor quality control involving materials and components with unknown toxicological relevance.

“The metal profiles observed are consistent with emissions from heating coils and electrical components, identifying the device itself as a critical source of exposure and highlighting important gaps in how vaping risks are evaluated.”

Dr. Bordin explains this is important because many people believe vaping carries less risk than conventional cigarettes. This perceived reduction in harm, along with misleading marketing campaigns, has contributed to the rapid uptake of e-cigarettes globally, particularly among younger demographics. In Australia, for example, e-cigarette use among young adults increased from 5.3% in 2019 to over 21% in 2023, with a similar rise in adolescents.

“Our findings challenge the assumption that e-cigarettes are safer and show how critical it is to review current vaping regulations, which should be expanded to include device-derived emissions, not just the e-liquid composition,” she said.

“Vaping can deliver toxic metals directly into the lungs, even after short-term use. This information is important for anyone considering vaping, especially young people, because these metal exposures are largely invisible and rarely discussed.”

Thank you to phys.org for this alarming report.

I hope I don’t need to remind you that increased levels of heavy metals in the body and the brain are associated with an increased risk, at an earlier age, of dementia.

This is Dave Reece ZS1DFR, having given up smoking in 1972, and thankfully never having tried vaping ever, and reporting for HAMNET in South Africa.