Penguins have thrived in Antarctica's extreme environment for thousands of years, but they still rely on relatively stable weather and ice conditions, and those conditions are changing.
Flooding in portions of Iowa and Illinois, active tropics, and more heat across the United States this week: Enough is enough! Read more on active weather.
Tropical Storm Don is aimed for Texas by Friday or Saturday. The National Hurricane Center forecasts it will become a strong tropical storm with winds around 65 mph.
Newark recorded an all-time record high of 108 F on July 22, 2011. Nighttime lows were in the low 80s - they're typically in the low 60s. Read more on the heat.