The floods that struck last week just before the first anniversary of the January wildfires show how extreme weather is defining life in the L.A. region.

Los Angeles County is under a flood watch which was issued by the National Weather Service on Thursday at 12:17 a.m.

In New York City, forecasters predict temperatures in the low 30s Fahrenheit (around zero degrees Celsius) amid snow flurries when hundreds of thousands of people witness the ball drop in Times Square...