During that same period, Omaha’s average high is projected to be 93.6, similar to the current average in Hobart, Oklahoma, up from Omaha’s current average high of 85.2 degrees.

The website offers a glimpse at two different futures, one based on continued high emissions of global warming gases and other trends. The other is based on lower emissions.

The numbers cited above, which project an Oklahoma future for summers in Omaha and a Texas one for Wellfleet, are based on current trends.

One of the greatest challenges posed by global warming is that the need to adapt doesn’t abate, Shulski said.

“When you look at the business-as-usual curve, we don’t stabilize,” she said. “The average (temperature) that we plan around ... that’s going to keep going up; it doesn’t level off. To me, that’s really frightening. Things work much better if it’s a stable climate, stable conditions that we’re planning for.”

The implications of a rapidly warming planet are numerous, and the analysis points to some of those: worse and more frequent heat waves, more intense droughts and increased frequency and intensity of flooding.