$3.66DESIGNATEDAREASHIGHER©2023latimes.comTHURSDAY,JULY13,2023TheU.S.inthelasttwomonthshasresembledthesetofablockbusterdisastermovie,withheatwaves,wildfiresortorrentialrainaffectingmuchofthecountry.Arewedoomed?Scientistssay,no,humanscanstilldosomethingaboutclimatechange.NATION,A6KansasCity,Mo.CharlieRiedelAssociatedPressWashington,D.C.MandelNganAFP/GettyImagesMontpelier,Vt.JohnTullyFortheWashingtonPostSanRafael,Calif.JustinSullivanGettyImagesWEATHEREXTREMES—‘ANEWABNORMAL’TheunionrepresentingHollywoodactorswasinashowdownwiththemajorstudiosWednesdayafter-noon,settingthestageforapossiblesecondindustrystrike.AfederalmediatorwasbroughtinWednesdaytohelpreso...