It's to the point where you have to take all the studies regarding climate heating and cooling with a grain of salt. It's enough to make my head spin trying to make sense of each new piece of information which comes along. Now a study is making the argument that landscaping Los Angeles yards with drought tolerant plants instead of water loving grass will actually make the city warmer.
"A lawn-less Los Angeles would be up to 3.4 degrees warmer during the day than it is now due to the lack of irrigation for the grass and plants. Water is a cooling agent.
However, and more confusing, is what these studiers say also happens which cancels out the warmer day time. "The authors also report that transforming lawns to drought-tolerant vegetation has an average nighttime cooling effect of about 5.4 degrees that more than makes up for the daytime warming."
It's just like politics, better not to get overly invested in anything that is said day by day.