you, i'm devin dwyer. >> good to see you again, devin, i'm rina ninan. >> starting to feel like summer out there. hot, muggy. two days away, official start of summer. it is here. >> it is here. lots of crazy weather. that's where we start. we begin with extreme weather from oppressive heat to more damaging twisters. >> that's right. several powerful tornados tore through the plains overnight. this one touching down in crow lake, south dakota, before first splitting apart and merging again. our coverage begins with abc's mary bruce. >> reporter: the national weather service says a twister went right through the heart of the town of westington springs, south dakota, damaging homes and businesses. tornadoes also touched down nearby. elsewhere, summer is around the corner. >> very hot. excruciating hot. >> reporter: a heat wave scorching 2/3 of the country. hottest city, washington d.c. with temperatures climbing to 94 degrees. >> cold water. $1. >> reporter: locals and tourists