Swimming in February

The weather in Las Vegas has been amazing, mid to upper 80's.  Our pool has been getting warmer, in fact I have seen it as high as 71!  I will not swim in anything less than 85 (for the water temp) but my crazy kids decided that 71 was plenty warm enough for them.  Did I mention how crazy my girls are?  They swam for about 20 minutes and they were in and out a lot.  I was surprised that they weren't shivering or that their lips weren't blue but you can clearly see that they look like they really enjoyed the water.  Luckily my brother is so sweet and was willing to get in with them.  Actually he was probably just as excited (if not more) as they were.