from japan to england, canada, california where there are 17 wildfires raging. is global warming the common thread here? do we know? >> it's a common thread. the problem is we live in a world where so many things are changing. when the houston floods happened, i interviewed a jeeg rafr named steven straiter. i was at pro publica at the time. not national geographic society. for a big story on development of disasters. what's happened is almost a fast forward. actually, faster than climate is changing, which is happening, we are building our way into these blood and fire zones all around the world at a speed that's remarkable. steve straider, this villanova university gee og rafr calls it an expanding bullseye. it's as if we're painting a bullseye in the way of these hot zones. >> building our way in.