Annika Hammerschlag / Associated Press

Evolution works over millennia. Climate change is moving far faster. That mismatch is killing some of the planet’s most vital ecosystems, from California’s towering redwoods to the seagrass meadows along its coast.

Coupled with exertion, extreme heat exposes agricultural workers to more health risks, including miscarriages, stillbirths, preterm births and low birth weight in infants.