Clownfish wrote:The important thing with radiant heat is to shield yourself as much as possible. This means covering up exposed skin; even though it's probably going to be hot weather, have a long sleeved shirt and long pants. As the fire front approaches, if you can find an object to shield yourself, such as a fallen log, do so. Other shelters might be a running stream, wet gully, lakes or even the ocean. A good option would be to find a creek with a fallen log in it! Also look out for bare, rocky outcrops. Lie face down, to keep your face covered and to try and find cooler, smoke-free air close to the ground. As a last resort, you may be able to run through low flames onto burnt ground.
A fiew other things worth mentioning:
If possible, avoid wearing nylon or other synthetic clothing (if you're like me, that means most of my bushwalking clobber!). Synthetics burn easily, some can even melt onto your skin - not nice! Cotton is best.
In a severe wildfire, people often get caught by the small spot fires that start up ahead of the fire front. I've been 500m in front of a fire (ex-fire researcher in WA) and had small fires starting up around me, which very quickly start to generate enough smoke to cause confusion. I learnt that one the hard way! It's also something to keep in mind if your lying face down.
With a less severe wildfire, the fire front may only be a few hundred metres wide. In this situation, and particularly if it was moving uphill towards me, I'd opt for moving perpandicular to (ie. across) the face of the fire and, if possible and the flames are low, get back onto burnt land across the flank of the fire.
An emergency blank could be great for shielding against radiant heat (although I do wonder what would happen if it was extreme heat).
Freshly burnt ground can be very hot. Best to have heat resistant soles on shoes/boots.