A hailstorm of mammoth proportions hammered sections of Mexico City Sunday. Several feet of hail piled up, making some city roads impassable.

“Roads such as the North Loop [el Periférico Norte] were flooded by hail and flooding, so municipal and Federal District workers labored for hours to clear them, Notimex reported,” wrote CNN Mexico.

Mexico news organization Azteca Noticias called it a “historical hailstorm”.

Pictures from Twitter are remarkable; parts of the low latitude city appear transformed into a winter wonderland in the dog days of August:

FOTOS: La granizada de ayer dejó bloques de hielo en vías como Periférico, Reforma y Circuito http://t.co/MFRWr3Moo2 pic.twitter.com/bJBmXKE4tU — REFORMACOM (@REFORMACOM) August 18, 2014

This is something you funny see. Two feet of hail in Mexico city pic.twitter.com/NCx6mqNoRp — Johnny Ayahuasca (@ripster31) August 19, 2014

An intense hail storm battered Mexico City over the weekend causing flooding in some parts of the city. #ntv7 pic.twitter.com/ECTjGXlOwu — ntv7 7Edition (@7Edition_ntv7) August 19, 2014

OMG hail storm in Mexico City last night O.O WTH weather is crazy… pic.twitter.com/pAYONNrN3W — BlueHair-Idon’tCare (@sandyzzzen) August 18, 2014

Mexico City under ice. Mid summer hail storm freezes activities @BBCWorld @CNNMex pic.twitter.com/UNg1g37kLy — Marintia Escobedo (@Marintia) August 18, 2014

Hail is not uncommon in the Valley of Mexico, which includes Mexico City.

On Sunday, an area of low pressure at high altitudes generated the instability necessary for the vigorous, hail-producing storms.

Vórtice superior y zonas de inestabilidad para esta tarde-noche en México con potencial de tormentas #Granizo pic.twitter.com/Rb2I0nYC7f — Ing-Geofisico (@chaac_tlaloc) August 18, 2014

In addition to hail, flash flooding was also reported in the region.

Here’s video (narrated in Spanish) from Mexico City from Aztec News via YouTube: