<div><b><span style="font-size: 1rem;">Forecasters say the coldest wind chill ever has been recorded in the continental US as an Arctic cold snap freezes a swathe of North America.</span><br></b></div><div><br></div><div>The National Weather Service (NWS) said the icy gusts on Mount Washington in New Hampshire on Friday produced a wind chill of -108F (-77C).</div><div><br></div><div>Nearly 100 million people across the north-eastern US and Canada are shivering in the frigid blast.</div><div><br></div><div>Authorities warned frostbite could strike in less than 10 minutes.</div><div><br></div><div>Residents from Manitoba to Maine are being urged to limit their time outdoors until Saturday in the "once-in-a-generation" cold snap.</div><div><br></div><div>The NWS said the actual temperature on the summit of Mount Washington at 20:00 on Friday (01:00 GMT Saturday) was down to -46F - the coldest ever recorded there. - BBC</div><div><br></div><div>bnbd24/fas</div>