Three studies show smoke from Canadian wildfires led to a spike in people with asthma visiting emergency rooms in the United States.

Showers and severe thunderstorms possible both Saturday and Sunday

El enfrentamiento entre Israel y Hamas provocado por semanas de tensiones en Jerusalén se intensificó el martes, cuando Israel lanzó nuevos ataques aéreos contra la Franja de Gaza, que mataron a varios milicianos y civiles, mientras que los extremistas atacaron el sur de Israel con cientos de cohetes, matando a dos mujeres israelíes.

Secondhand smoke isn’t believed to directly spread the virus, experts say, but infected smokers may blow droplets carrying the virus when they exhale. Being able to smell the smoke might be a red flag that you’re standing too close to the smoker. The respiratory droplets people spray when they talk, cough or sneeze are believed to be the main way the virus spreads. You should steer clear of secondhand smoke regardless. Breathing in secondhand smoke from cigarettes can cause various health problems, according to the U.S. Centers for Disease Control and Prevention.

MIAMI – The smoke coming from the fires in southeastern Australia has spread high into the atmosphere, and during an eastward dispersal, it will be making at least one full circuit globally, which will be affecting air quality, according to NASA scientists. In New Zealand, the smoke was able to darken mountaintop snow. By Jan. 8, NASA satellites detected the smoke had traveled halfway around the earth and was turning the skies hazy. NASA released this animation showing how the smoke from the fires in Australia is affecting air quality around the world. (NASA)NASA scientists expect the smoke to affect atmospheric conditions and air quality globally, but they do not know with certainty if it will have a cooling or a warming effect.