Severe in Las Vegas?

In view of my impending trip to Las Vegas I've been checking out the weather reports and forecasts at Weather Underground. Noticing that there was a severe weather report, I took a look - and found these delights:

Local Storm Report

02/13/2008 0700 PM

North Las Vegas, Clark County.

Non-thunderstorm wind damage, reported by County official.


Public works dept reports 5 street light poles down, 8
stop signs blown over, 3 intersection traffic lights
blown down.


02/13/2008 0700 PM

Las Vegas (downtowlefield, Clark County.

Non-thunderstorm wind gust m67.00 mph, reported by unknown.


At McCarran International Airport visibility was down to 4
miles in blowing dust and a port-a-potty blew across
runway 25... damaging Airport lights and a vehicle.


02/13/2008 0700 PM

North Las Vegas, Clark County.

Non-thunderstorm wind damage, reported by broadcast media.


Mobile home blown into a neighboring house

And on a completely different tack, a question: What's with all the blue lights on the blocks of flats to the south of the M8 as you leave the Kingston Bridge area, heading west? Is it merely a design thing? Or is it to stop the denizens from shooting up in the area round the foot of the blocks? I just wondered ...