United Nations reports 2 million people were killed from extreme weather over the past half-century

More needs to be done to improve alert systems for extreme weather events, according to a U.N. agency which reported that millions were killed globally in the past half-century.

The stark recap from WMO came as it opened its four-yearly congress among member countries, pressing the message that more needs to be done to improve alert systems for extreme weather events by a target date of 2027.