The phrase "record warmth" means that temperatures have reached an extremely high point that has never been experienced before or has broken previous temperature records. Full definition
The record high temperatures in each case, along with the tinder dry conditions, led to extensive wildfires that were extremely costly in terms of lives, structures, human dislocations, and costs.2 3 The exceptionally warm March in the U. S. is but part of record warmth for the first five months of the year (see Figure 8 below) and, along with an absence of snow, the rapid snow melt has left the Rocky Mountains almost without snow by 1 June 2012. (climatecommunication.org)
The first three months of the year were characterized by warmer - than - average conditions across much of the world's surface, with record warmth across New Zealand and its surrounding ocean, and scattered across Far East Russia, southern Asia, southern Australia, and across all oceans. (ncdc.noaa.gov)
Strong El Niño conditions were present across the central and eastern equatorial Pacific Ocean during November 2015, as evidenced by record warmth across much of this region. (ncdc.noaa.gov)