At least nine people have been killed by flash floods in Rio de Janeiro.

The mayor has declared a crisis after the Brazilian city was battered by heavy rain on Monday and Tuesday.

More than 31cm of rain (13 inches) fell in some parts of the city within 24 hours, the mayor’s office said.



According to Globo TV, 245mm of rain were recorded within just a few hours in Copa Cabana, while the April precipitation average does not exceed 95mm.


The satellite images from MODIS-TERRA below show the extremely low-speed movement of the cloud zone that affected the region. This slow movement was one of the most important reasons of this natural disaster.


On the maps below showing the condition on Sunday 7/4/2019 (2100 UTC). In the first map, the shallow low pressure system causes a precipitation zone, which is collocated with the cloud zone in the satellite. In the second map, the CAPE index is fairly enhanced causing eventually a quite unstable regime, ideal for the formation of storms.



Source: MSN

At least 12 people have died due to the breaking of polar vortex, a phenomenon that affects the northern parts of the US.


The authorities have instructed that schools will remain closed and places for homeless people will be available for use. Hundreds of train services and flights have been canceled.



In the mid-western states, the temperature has dropped below -45°C. Snowfall are expanding over eastern regions.

Although forecasters inform that the temperature will increase in the weekend, this does not seem to be a relief, as strong winds will be preserved and the temperature will remain around -34°C.


Today, the temperature dropped to -29°C in Minnesota and Michigan and to -34°C in north Dakota.

Now, the cold intrusion is moving towards eastern regions, such as Massachusetts, New York and Pennsylvania. In Boston, the temperature dropped to -21°C.

According to media and authorities, 12 deaths have been caused by this cold outbreak since last Saturday in mid-west US. Some of them are dead due to car accidents, while others by the extreme weather.

Videos on youtube show people to drop boiled water in the air, which instantly freezes, while train officers get fire on train rails in order to avoid any contraction.

In the meanwhile, more than 30 temperature records have been observed in the mid-west US (-40°C in International Falls of Minnesota, -30°C in Chicago).

Extreme cold conditions caused hundreds of car accidents and a pile up of 20 cars in Grand Rapid of Michigan. Moreover, 2500 flights are canceled and more than 3500 are delayed this morning. Post offices stopped their services to many American states today.

In the broad region of Great Lakes, these extreme conditions have caused unusual natural phenomena (e.g. a part of the Niagara falls has literally been frozen).


Winter has come in northern US and Canada. In the present article we present six videos that summarise the wintry conditions in these regions during the last week.


During the last week, winter has come in the northern corner of America with snowfalls and cold temperatures. This is not that awkward for this period of the year. This situation is linked with the fairly mild weather in Europe. As winter in Europe is still wanted, let’s have a look at the following videos in order to get into wintry mood:


Ontario, Canada – 29/10/2018


Denver, Colorado, 30/10/2018


Trinidad, Colorado –  31/10/2018


Montreal, Quebec – 3/11/2018


Eisenhower-Johnson Tunnel, Colorado –  3/11/2018


North Wisconsin – 4/11/2018