The phrase "to become warmer" has a literal meaning of increasing in temperature or becoming hotter. However, it can also be used figuratively to describe a situation or person that is becoming more friendly, welcoming, or hospitable.
Sentences with «to become warmer»
If trends continue, 2010 could become the warmest year on record. (news.mongabay.com)
I hope the weather becomes warmer soon so that we can see amazing spring outfits from your end! (fanciersworld.com)
However, the ocean has hit its limit as the water becomes warmer under the influence of climate change and global warming. (earthday.org)