Climate change's heat is baking us to death. We must act

America celebrated its 250th year of independence under a historic heat dome that shattered more than 148 records for daily high temperature across the Eastern United States.

The nation’s capital recorded the hottest Fourth of July on record at 103 degrees.

Philadelphia, where our Declaration of Independence was written, recorded three days in a row above 101 degrees for the first time ever.

The heat last week was so severe that parades and events across the country were canceled, including the flagship Independence Day Parade planned in Washington.

The heat index in Chicago exceeded 100 degrees on July 1, putting the power grid under strain.

It isn’t just the United States.

Heat waves have rocked Europe three times already this summer, with record temperatures hitting the United Kingdom, France, Spain and Portugal in late May, late June and again right now.

The June heat wave caused more than 1,300 excess deaths.

With less snow on the ground each year to deflect the sun, and the warming Arctic nearby, where rapidly melting sea ice leaves more ocean to absorb the sun’s energy, Eu ...