Droughts , wildfires and heat waves have plagued the U.S. recently , says Jane Lubchenco . We 've witnessed the warmest spring since record-keeping began in 1895 , she says . Thirty-one states reached record-high temperatures . Lubchenco : Heat waves in Texas and Oklahoma were exacerbated by climate change . The drought has been particularly severe for California, where temperatures soared to record highs last year.
Droughts , wildfires and heat waves have plagued the U.S. recently , says Jane Lubchenco . We 've witnessed the warmest spring since record-keeping began in 1895 , she says . Lubchenco : Heat waves in Texas and Oklahoma were exacerbated by climate change . The drought has been particularly severe for California, where temperatures soared to record highs last year.