lightning+and+sun

outdoors home > hazards clinical > environmental toc =Lightning = media type="custom" key="9936773" width="160" height="160" [|Lightning] Lightning safety (NOLS) [|Lightning injuries] [|Lightning safety] [|Lightning precautions] In mass casualty lightning incidents triage system may have to be revised as casualties who are initially apnoeic may recover completely.

[|image]of ribbon lightning

=Sun = UV radiation from the sun can be harmful. Some exposure is essential - adequate vitamin D levels require some exposure to UV radiation Acutely it causes sunburn (and photo keratopathy - affecting the cornea - in some settings referred to as snow blindness) Chronic exposure increases the risk of skin cancer and cataract.

Sunburn
A burn of the skin following exposure to UV radiation. Usually they are superficial (erythema). When more severe blistering may be seen (partial thickness). <span style="font-family: Georgia,serif;">In the wilderness/expedition setting there are two key problems arising from sunburn: pain and impaire thermoregulation.

<span style="font-family: Verdana,Geneva,sans-serif;">Reducing harm from UV radiation
(from NHS website in UK)
 * wear clothing to protect your skin from UV rays, such as a long-sleeve shirt, trousers and a wide-brimmed hat
 * wear good-quality sunglasses to protect your eyes from UVA and UVB rays
 * keep babies and children out of direct sunlight
 * use sunscreen that has a minimum sun protection factor (SPF) of 15 (use a higher SPF for fair and sensitive skin), and reapply it frequently (see below for more information)
 * seek advice immediately from your doctor if you notice changes to any of your moles – for example, a change in their size, colour or texture

<span style="font-family: Verdana,Geneva,sans-serif;">Links
<span style="font-family: Georgia,serif;">[|Sun safety] <span style="font-family: Georgia,serif;">[|Tropical walking] (BMC) <span style="font-family: Georgia,serif;">[|UV radiation and eyes] <span style="font-family: Georgia,serif;">[|Using sunscreen]