Emergency notification system
for extreme temperatures

About the Service

Extreme temperatures are the cause of excess morbidity and mortality in our societies. Real time condition updates during the ongoing event could help prevent the consequences. We have developed a tool that can spot-out in real time the city areas that suffer most during the ongoing event, indicating thus where the victims are to be expected. EXTREMA uses real-time satellite data, along with other model and city-specific data to estimate the temperature, humidity, and discomfort index for every square kilometer in the city. Temperature estimates are updated every 5 minutes, providing data at a spatial and temporal resolution that is not available from any other service.


Our partners.

Amazing Features

We've got lots of useful features.

Your Risk

Through the mobile app, you receive a personalized heat stress risk for your current location and recommendations on measures to reduce your risk.

Cooling Centers

The EXTREMA app provides navigation information, by foot or public transit, to the nearest cooling center and helps you choose the right one for you.

Multiple Profiles

The app supports multiple users. This is so useful when you want to check the elderly, just enter their profile and location and get their extreme temperature risk estimation.

Satellite Based

City authorities will get real-time images/maps of extreme temperature hazard distribution in their city, together with other relevant variable, like humidity and discomfort index

Next Day Alerts

City authorities will get a one day advance alert for expected extreme temperatures (based on meteoalarm.eu) to allow for proper respond and management of the cooling centres.

City Dashboard

Cities will receive an information management tool for the cooling centers, including the ability to change opening hours, capacity, contact information, and add more centers in a particular area.


Selected Highlights.

Kick-Off Meeting

Feb 9, 2018

EXTREMA DG-ECHO project kicked-off at the Athens City Hall on Friday 9th February 2018. 7 partners from 5 EU countries agreed that Real time condition updates during an ongoing extreme temperature event together with solid research and specific actions could help prevent the consequences.


This is the common goal behind EXTREMA. Let's start!


EXTREMA launched in Rotterdam

June, 7 2018

EXTREMA Rotterdam mobile App launched at Resilient Rotterdam Day event on Thursday 7th June 2018 and is now available on GooglePlay (search for EXTREMA Rotterdam). The City of Rotterdam has recognized the problem of high temperatures and suggests numerous cooling centres.


EXTREMA Rotterdam mobile app evaluates your heat risk and informs you about the closest to you cooling centre. More information can be found here


NOA becomes Platform Parter of 100RC network

Nov 23, 2017

On 23 November 2017 at the United Nations Campus in Bonn, we announced the partnership of the National Observatory of Athens with the international network 100 Resilient Cities Pioneered by the Rockefeller Foundation for the provision of EXTREMA service - Emergency notification system for extreme temperatures.

Press Release: here


EXTREMA is a DG ECHO co-funded project, 2018-2019, GA 783180.

Contact us

We are happy to hear from you! Contact us today and join our city network! Get your City on board!

Extrema Coordinator

Iphigenia Keramitsoglou
National Oservatory of Athens

Send your message

contact at extrema.space