World daily temperature records have been smashed this week, according to preliminary data. The modeling tools that produced these estimates can provide an early warning of extreme heat events, even if they aren't as precise as monthly and yearly reports produced by leading agencies, say experts. The University of Maine has established an online tool called Climate Reanalyzer, which shows the curves of average global temperature for each day since 1979. For more on the unprecedented record heat worldwide, FRANCE 24 is joined by Kristina Dahl, principal climate scientist for the Climate & Energy program at the Union of Concerned Scientists.