• Crisis Severity ?
    0 Very low
    Very high 5
  • Impact ?
    0 Very low
    Very high 5
  • Humanitarian Conditions ?
    0 Very low
    Very high 5
  • Complexity ?
    0 Very low
    Very high 5
  • Access Constraints ?
    No constraints
    Extreme constraints

Key figures

  • 30,800,000 Total population [?]
  • 27,100,000 People affected [?]
  • 20,700,000 People in Need [?]

Special Reports


Special Reports




Ongoing conflict between the internationally recognised Government of Yemen (IRG) and the De-facto Authority (DFA), better known as the Houthis, escalated in 2015. Following the Houthi takeover of the capital, Sana’a, the Saudi-led coalition intervened militarily in support of the government. Since then, the conflict has resulted in a severe humanitarian crisis with over 18,557 civilian casualties reported between March 2015 and November 2020, up to 4.3 million people displaced, severe access constraints, and economic downturn leaving more than 20.7 million people (66% of the population) in need of humanitarian assistance?.

Yemen was historically divided by different political, tribal, ethnic, and religious identities. Current conflict further fragmented Yemen into three main areas of control. As at September 2021, the Houthis control the majority of northern and central governorates, the UAE-backed Southern Transitional Council (STC) controls part of southern Yemen (mainly Aden and Socotra), and the IRG controls the remainder of southern and eastern governorates ?.

Active conflict between the Houthis and the IRG in 2020 intensified in some areas opening seven new frontlines along the borders of Ma’rib, Sana’a and Al Jawf governorates. In Al Hodeidah, Ad Dali', Al Bayda, Sa'dah and Ta'iz governorates, conflict remains intermittent with no major changes since the Stockholm agreement was signed in December 2018?. Talks to implement the Riyadh agreement, signed in November 2019 between the IRGand the STC, resumed in July 2020 after tensions has raised between the two parties in Abyan in May 2020. The negotiations suffered multiple setbacks and the implementation of the plan remains stalled, despite the formation of a new Cabinet on 18 December 2020, including both IRG and STC members?

The war has added to problems of chronic poverty, weak governance, water scarcity, and systemic discrimination. People’s livelihoods and resources have depleted while prices of basic commodities have more than doubled, reducing purchasing power. In 2021, 16.2 million people in Yemen are expected to face high levels of acute food insecurity (IPC Phase 3 or above). Economic warfare between the IRG and the Houthis has also led to fuel and basic commodity shortages?. Yemenis have also suffered outbreaks of diseases including COVID-19, cholera, diphtheria, and dengue fever. An estimated 17.9 million people lack adequate healthcare and only 50% of health facilities remain fully functional?.

Latest Developments


21/10: The Houthis took control of Al Abdiyah district in the south of Marib governorate on 17 October, following three weeks of intense fighting. Clashes also continue in bordering districts, and movements in and out of Al Abdiyah district are severely restricted. An estimated 35,000 people in Al Abdiyah are affected, and there are emerging reports of food and medical supplies shortages. The only hospital in the district was hit by a missile on 14 October, adding to issues around availability of and access to medical care. Ongoing hostilities in southern Marib - particularly around the main road junction in Al Jubah district - accompanied by sustained air raids, are likely to further reduce access to critical goods and services. The affected population are at increased risk of direct harm, displacement, and damage to civilian infrastructure. Humanitarian access continues to be restricted due to the lack of safety. ?




Access remains extremely challenging in Yemen as a result of insecurity, bureaucratic impediments, and COVID-19 restrictions. In areas under the De-Facto Authority in the north of Yemen (also known as the Houthis), a range of new requirements for travel permits was issued at the beginning of 2021, including sharing aid recipients’ lists, vehicle lease contracts, and other sensitive or protected information. Political instability and deteriorating security in areas controlled by the Internationally Recognised Government of Yemen – especially Aden and the west coast (mainly Al Khawkhah and Al Makha districts) – have caused increasing access constraints that were not present in earlier years of the conflict. On the west coast, new administrative requirements by local authorities, operating independently from the Internationally Recognized Government, disrupted movement and aid delivery. These requirements were lifted in April until the end of the year. COVID-19 containment measures have also caused impediments to humanitarian response, such as restricting movement, preventing technical advisors from monitoring the quality of the services provided, and leading to remote management. COVID-19 protocols also increased operations’ cost and delivery time. Assistance in remote areas is reducing as responders are resorting to de-prioritising activities in those locations because of increased transportation costs related to fuel price hikes.

Read more in the latest ACAPS Humanitarian Access Overview.

Update from the October 2020 Global Risk Analysis


Continued depreciation of the Yemeni riyal drives up inflation, reducing households’ purchasing power and their ability to meet basic needs

The risk of inflation being driven up by the continued depreciation of the Yemeni riyal, as identified in October’s Global Risk Analysis, remains high. This is mostly a result of the depletion of foreign currency reserves and the likely continuation of competing economic regulations between the Internationally Recognized Government of Yemen (IRG) and the De-Facto Authorities in the north (also known as the Houthis).

Since January 2021, the riyal in IRG-controlled areas has resumed a steady depreciation, following a temporary appreciation in December 2020 related to the announcement of a new cabinet and the release of funds from the Saudi deposit to cover letters of credit for the import of basic commodities. The value of the riyal in December 2020 increased to YER 640 per 1 USD; it then started to depreciate again up to YER 860 per 1 USD in January 2021, from an average of YER 778 per 1 USD throughout 2020. The value of the riyal in Houthis-controlled areas remained stable at around YER 595 per 1 USD in January 2021, in line with the average in 2020.

The bilateral support by the Kingdom of Saudi Arabia to the IRG - which contributes to the stability of the riyal in Yemen - is likely to be affected by a UN Panel of Experts’ report highlighting a lack of transparency, allegations of corruption, and misuse of the Saudi deposit by the Central Bank of Yemen (CBY) in Aden (UNSC 25/01/2021). This could also push the IRG towards significant reforms within CBY Aden, aimed at improving transparency and possibly encouraging foreign financial support, which could potentially contribute to currency stability. If the current situation continues however, dwindling foreign currency reserves will continue to drive inflation up, affecting people’s ability to afford food and other basic commodities. The escalation of conflict since the beginning of February in Marib - the main source of oil and liquefied gas in Yemen - could significantly disrupt oil and gas facilities and extraction operations, affecting IRG revenues and currency stability.

Read the latest October Risk Analysis here.



Since the recent conflict in 2015, food prices have doubled and the cost of basic living, measured by the Survival Minimum Expenditure basket has increased fourfold. As a result, over 24 million Yemenis are in need of humanitarian assistance.

This Yemen Economic Tracking Initiative (YETI) aims to provide a platform to track key economic trends, developments, and risks to support economic policymaking for Yemen.

This new platform brings together data from a range of sources to provide a greater overall and comparative understanding of the current political-economic situation in Yemen. 



As of 20 September 2021, there have been 8,988 COVID-19 cases reported in the country, including 1,703 deaths. Yemen recorded a steep increase of COVID-19 cases in March and April 2021, the number of cases started to decrease in June but increased again in August and September, although at a lower rate than previously. The most affected governorates are Hadramawt, Taiz and Aden. However, the higher numbers in Hadramawt are likely due to better testing and reporting in that governorate. Houthi authorities have officially reported only four cases, including one death, in Sana'a city and have not reported any case since May 2020. The number of cases both in the north and the south of Yemen is largely under-reported due to limited testing facilities, difficulties in accessing health care, and the risks of seeking treatment.? Currently, there are few restrictions related to COVID-19 in place in Yemen. Al Wadeeah land border point is open, allowing Yemenis holding a negative PCR test in addition to a COVID-19 vaccination certification to enter KSA. Al Shahin land border point is partially opened; only permitting entry to Yemen from Oman subject to providing a negative PCR test.? In Marib governorate, local authorities imposed a curfew from 9:00 PM until 04:00 in an attempt to combat the spread of the virus.

On 31 March 2021, Yemen received 360,000 doses of vaccine through the COVAX initiative. The country is expected to receive a total of 1.9 million doses, which would only cover less than 1 million people (3% of the total population). In IRG areas, the vaccination campaign started on 20 April 2021 and a total of 323,000 injections have been administered between April and September. WHO confirmed that that 10,000 doses of vaccine reached Sana’a on 31 May 2021, it remains unclear if the De-Facto Authority in the north (the Houthis) have started to administer the injections. ?There is a risk that the doses will expire if not inoculated within the right timeframe. As Saudi Arabia started to require a proof of vaccination to enter the country, many Yemeni workers in the Gulf country, who had come back to Yemen for the celebration of Ramadan, could not go back to work in Saudi Arabia.? Many risk seeing their visa expire before they can manage to get a vaccine – therefore loosing their income.

To find out more read ACAPS Risk report and State narratives, social perceptions and health behaviours report 



WASH: Yemen is one of the most water scarce countries in the world. Around 18 million people lack access to safe water and sanitation. Access to water has been further diminished by the impact of over five years of conflict leaving 20 million people in need of WASH assistance. The lack of water contributes to a high prevalence of preventable diseases. IDPs, especially living in informal settlements have limited access to clean water and sanitation.?

Food securityConflict and economic decline are the main drivers of food insecurity in Yemen. Since the conflict started in 2015 livelihoods have been disrupted, reducing income opportunities and the ability to purchase food. Food insecurity is most severe in areas with active fighting and is particularly affecting IDPs, marginalized groups, fishing communities and landless wage laborers. Projections for January - June 2021 estimate that the number of food insecure people will reach 16.2 million, including 11 million in IPC Phase 3 (Crisis), 5 million in IPC Phase 4 (Emergency) and 47,000 in IPC Phase 5 (Catastrophe). Estimations suggest that in 2021 there will be 300,000 people more facing acute food insecurity compared to late 2018, with a slight decrease in the number of people in IPC Phase 5.? 

Health:  Access to healthcare is severely limited, with only 50% of health facilities fully functional leaving almost 20 million people without adequate access. Lack of salaries for heath personnel, damage to health facilities and difficulty importing medicines and medical supplies are all accelerating the decline of the already deteriorated public health services. Private-sector health services exist but remain out of reach for millions of vulnerable people due to high prices?. The first case of COVID-19 in Yemen was recorded on 10 April from Hadramout. See COVID-19 box for more information. 



The ACAPS Yemen Analysis Hub provides inter-sectoral, forward-looking analysis to support a stronger evidence base for humanitarian decision making in Yemen. Learn more about the Yemen Analysis Hub.

If you are interested in the reports produced by the hub, please subscribe to the ACAPS Yemen mailing list.

Information Gaps and Needs


More granular information is required to better understand the causes and level of needs. 

More research on specific needs of vulnerable and marginalised groups is needed to understand the severity of needs and coping mechanisms between different communities. 

For more information read ACAPS Yemen Analysis Ecosystem report

Natural hazards


Yemen is prone to disasters. Flash flooding, and cyclones cause displacement, severe infrastructure damage, casualties, and the spread of multiple diseases each season. Seasonal rain in Yemen lasts from March to October and the threat of flooding is high in western and coastal areas.

Between July and August 2021, torrential rain and flash floods have caused damages to public infrastructure, destroyed and damaged around 10,000 houses, and affected an estimated 174,000 people across Yemen. Damages to roads have cause movement restrictions in many areas. IDPs living near water streams continue to be the most affected, due to lack of mitigation measures in place and inadequate shelter. While the intensity of rain and flash floods is less compared to previous years, the impact is becoming more severe due to households' depletion of resources, exposure to multiple hazards, lack of renovation of public infrastructure, and houses previously damaged by floods.?

For more information on flooding read ACAPS Briefing note here   

Economic situation


The beginning of conflict in 2015 led to economic warfare between the IRG and the Houthis. The Yemeni rial (YER) has lost value against the US dollar (USD), negatively impacting prices and purchasing power. Reduced direct foreign investment, and a drop in remittances due to the COVID-19 pandemic, have led to a liquidity crisis and depreciation of the rial under IRG control to unprecedented levels. There is a direct correlation between currency depreciation and price inflation as Yemen imports 90% of its staple food. Households struggle to pay for food, transportation, electricity, and water due to price rises.  

Since 2018, the Houthis and the IRG have implemented divergent monetary policies. Both sides have their own set of economic and political levers. These divergent economic policies have destablised the rial and created two separate economies in Yemen. The competing policies have resulted in reduced liquidity in the north under Houthi control and an excess of newly printed banknotes in southern governorates under IRG control, two different exchange rates, further monetary and fiscal instability, and higher operating costs for traders and humanitarian operations.

For more information read ACAPS  volatility of the Yemeni riyal  report and ACAPS  food supply chain report .  


Yemen: Areas of control map and dataset


The ACAPS Yemen Analysis Hub produces a bi-weekly dataset providing an overview of the latest areas of control in Yemen, including a map, excel spreadsheet and GIS layer. All datasets are fully PCODED to Admin 2 district level, enabling interoperability with other datasets.

The datasets are published on HDX and can be found here.