This review found a high variety of natural hazard early warning schemes, as manifested by different wordings, number of alert levels, colour codes and pictograms. This results in compromised public awareness and understanding of (early) warning alert messages. This, in turn, means reduced probability of adequate, risk reducing actions taken by people in harm's way.

The growing importance of international business and trade, high tourist arrivals as well as increased labour migration call not only for national, but also internationally recognized warning schemes. Investments in early warning systems have improved the detection of approaching extreme natural events significantly in the past decades, however, the wide range of warning schemes makes it difficult for citizens to understand the warning and initiate adequate responses. Therefore, it is deemed necessary that warning messages follow consistent schemes across different hazards and countries, including colour codes (for example yellow, orange, red, for increasing dangers), wordings, pictograms and other features like acoustic signals. Alert levels in a standardised system will be quickly recognized by the public as demonstrated by the traffic lights scheme in many countries worldwide. Confusion would be further reduced if multi-hazard early warning systems follow the same numbers of alert levels for different hazards. The alert levels may have different thresholds in the respective countries but the basic message would be the same. International institutions like the United Nations would be in a good position to push such an agenda in line with the multi-hazard early warning approach of the Sendai Framework.

这次审查发现了各种各样的自然灾害预警方案，表现为不同的措辞，警报级别数量，颜色代码和象形图。这导致公众意识和对（早期）警告警报消息的理解受到损害。反过来，这意味着降低了人们以伤害方式采取适当的风险降低措施的可能性。

国际商业和贸易的重要性日益提高，游客的大量涌入以及劳务移民的增加，不仅需要国家，而且也需要国际公认的预警方案。在过去的几十年中，对预警系统的投资极大地改善了对即将发生的极端自然事件的发现，但是，广泛的预警方案使公民难以理解预警并作出适当的反应。因此，认为有必要在不同危险和国家/地区采用警告消息的一致方案，包括颜色代码（例如，黄色，橙色，红色，以增加危险程度），文字，象形图和其他特征（如声音信号）。标准化系统中的警报级别将很快被公众认可，正如全球许多国家/地区的交通信号灯计划所证明的那样。如果多灾种早期预警系统针对不同危害采取相同数量的警报级别，则混乱将进一步减少。警报级别在各个国家/地区可能具有不同的阈值，但基本消息将是相同的。像联合国这样的国际机构将很适合根据《仙台框架》的多灾种早期预警方法来推动这一议程。警报级别在各个国家/地区可能具有不同的阈值，但基本消息将是相同的。像联合国这样的国际机构将很适合根据《仙台框架》的多灾种早期预警方法来推动这一议程。警报级别在各个国家/地区可能具有不同的阈值，但基本消息将是相同的。像联合国这样的国际机构将很适合根据《仙台框架》的多灾种早期预警方法来推动这一议程。