Skip to content Skip to Content

CNN-weather/environment

Why nighttime heat can be so dangerous – and why it’s getting worse

By Rachel Ramirez, CNN (CNN) — Summers are getting hotter than ever, shattering all-time high temperature records, straining the energy grid and damaging critical infrastructure. Heat waves also are coming to include another increasingly dangerous element: overnight temperatures that don’t cool down enough to offer sufficient reprieve from oppressive heat, particularly for people without access

Continue Reading

Smoke from Canadian wildfires is still wafting south. Conditions for some are expected to improve soon

By Aya Elamroussi, CNN and Taylor Ward, CNN Meteorologist (CNN) — More than 100 million people are under air quality alerts Friday morning from Wisconsin to Vermont and down to North Carolina as smoke from Canadian wildfires continues to waft south, though conditions are expected to improve slowly into the holiday weekend. Storms Thursday brought

Continue Reading

A dangerous heat wave is intensifying in the South with more than 55 million people under heat alerts

By Nouran Salahieh and Taylor Ward, CNN (CNN) — More than 55 million people from southern Arizona to the Florida coast are sweltering under a worsening heat wave that is expected to expand its reach this week, bringing more dangerous triple-digit temperatures. Excessive heat warnings, the highest criteria of heat alerts, include Dallas, New Orleans

Continue Reading

How earthquakes are measured

By Jennifer Gray, CNN Meteorologist (CNN) — Measuring earthquakes is no easy task, given they strike suddenly and sometimes at global scale. When the Earth’s crust shifts abruptly, an earthquake occurs, with energy radiated out as seismic waves and shaking that’s sometimes experienced by people, buildings and infrastructure. Seismic waves and factors related to the

Continue Reading

At least 4 dead in Texas after severe storms bring tornadoes and tennis ball-sized hail to western and central US

By Alisha Ebrahimji, Elizabeth Wolfe and Dave Alsup, CNN (CNN) — All residents have been accounted for after a tornado ravaged a small town in northwest Texas, killing four people and injuring 10 Wednesday night, officials said. The search, however, continues as crews look for possible visitors or drivers who were in the area when

Continue Reading

Tropical storm watches and warnings cover parts of the Caribbean as Bret is forecast to bring strong winds and flooding

By Jennifer Gray, CNN Meteorologist (CNN) — Tropical Storm Bret again strengthened slightly during the day Wednesday and is forecast to reach the Lesser Antilles on Thursday as a strong tropical storm. Now packing 65 mph winds, the storm is likely already near its peak intensity. “Little change in strength is forecast during the next

Continue Reading