Richard Allan

@rpallanuk

Professor of climate science at the University of Reading:

1055 Siguiendo2180 Seguidores267 Publicaciones

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Exceptional southern UK aridity July 2026 @ukceh.bsky.social - record low rainall in England & Wales, heatwaves & wildfires, exceptionally dry soils & low river flows + declining reservoir/groundwater reserves resulting in flash #drought set to persist into Autumn: nrfa.ceh.ac.uk/sites/defaul...

Map showing low groundwater across the UK in July 2026

Map showing extreme rainfall deficit in southern UK in July 2026

Map showing low river flows in the UK in July 2026

Map showing exceptionally dry soils in southern UK in July 2026

Richard Allan@rpallanuk· 19h

Global #climate hazards @ukhsa.bsky.social 13 Aug 2026: 💦 #floods & landslides in Cameroon, India 🔥 #wildfire affects Canada, USA, Indonesia 🌀 #TyphoonDolphin strikes China ⛈️ tropical storms hit Japan, Philippines 🥀 #drought grips Somalia 🌡️ #heatwave over UK www.met.reading.ac.uk/~sgs02rpa/ex...

Image showing destruction of property that temporarily displaced some residents as several parts of Limbe, Cameroon (panafricavisions.com)

Richard Allan@rpallanuk· 3d

🌡️ The State of the Global Climate 2025 report is published: doi.org/10.1175/2026... ☁️ 🧊 🔥 This charts continued melting of ice & near record global temperatures last year but also identifies reduced cloud coverage & dry soils plus highlights extremes such as the Canadian and Iberian wildfires.

Richard Allan@rpallanuk· 8d

Global #climate hazards @ukhsa.bsky.social 5th Aug 2026: 💦 #flooding affects India, Vietnam & southeast USA 🌡️ #heatwave grips South Korea & western USA 🌩️ deadly lightning strikes Yemen www.met.reading.ac.uk/~sgs02rpa/ex...

A mud covered car sits outside a flood damaged home after floodwaters receded on August 4, 2026 in Sivasagar district, Assam, India [Ritesh Shukla/Getty Images via Al Jazeera]

Richard Allan@rpallanuk· 29d

Global #climate hazards @ukhsa.bsky.social 15th July 2026: 🌀 Typhoon #Bavi hits Philippines, China & Taiwan 💦 #flooding affects Bahamas, China & Russia ⛈️ storms strike India 🔥 #wildfire aftermath in Spain 🌪️ Tornado hits Vietnam www.met.reading.ac.uk/~sgs02rpa/ex...

Super Typhoon Bavi as seen from space is bearing down on China, Japan and Taiwan after hitting Guam and the Northern Mariana islands in the western Pacific Ocean [File: AFP from CIRA, NOAA]

Richard Allan@rpallanuk· Jul 14

Hot, dry end to June in UK on top of a dry spring with dry soils in the south, low river flows in east Scotland & East Anglia and some depleted reservoirs/aquifers with increased pressure on water resources through the rest of summer unless it becomes unseasonably wet: nrfa.ceh.ac.uk/sites/defaul...

Map showing above average rainfall in the northwest UK in June 2026

Map showing high river flows in the northwest UK but low in the east in June 2026

Map showing depleted groundwater in some aquifers of the UK in June 2026

Map showing dry soils over southern half of England in June 2026

Richard Allan@rpallanuk· Jul 13

In some temporary, slightly good news before the El Niño gets going, the annual CO2 growth rate from last year has been relatvely low in 2026 so far compared with other years based on @noaa.gov Mauna Loa data: www.met.reading.ac.uk/~sgs02rpa/co...

Richard Allan@rpallanuk· Jul 8

Global hazards @ukhsa.bsky.social 8 Jul 2026: 🔥 #wildfires Portugal, Greece, France & Spain 🌡️ #heatwave W Europe & USA east coast 💦 #flooding & landslides Bangladesh, India, China, New Zealand & central USA 🌪️ Tornadoes & Typhoon Bavi S China 🌩️ Lightning Pakistan www.met.reading.ac.uk/~sgs02rpa/ex...

A woman reacts during a wildfire on the outskirts of the northern city of Thessaloniki, 5 July, 2026 AP Photo via Euronews

Richard Allan@rpallanuk· Jul 2

Global #climate hazards @ukhsa.bsky.social 2nd Jul 2026: 🌡️ European #heatwave 💦 #floods Ghana/Côte d'Ivoire, India, Vietnam, Taiwan & USA 🌀 tropical storm hits Japan 🌩️ lightning strikes in India & Yemen www.met.reading.ac.uk/~sgs02rpa/ex...

A person wades through floodwaters, in Accra, Ghana, in this still image taken from a video, June 29, 2026 [Reuters TV via Reuters & Al Jazeera]

Richard Allan@rpallanuk· Jun 24

Global #climate hazards @ukhsa.bsky.social 24th June 2026: 🌡️ #heatwave grips largeparts of Europe ⛈️ Lightning strikes & #flooding Germany, India 🌪️ Tornado hits Thoothukudi/India & Mount Vernon/USA 🔥 #wildfire Miami/USA www.met.reading.ac.uk/~sgs02rpa/ex...

Commuters wade through a waterlogged road following heavy rain, in Kolkata, Tuesday, June 23, 2026.
TelegraphIndia.com PTI

Richard Allan@rpallanuk· Jun 17

This week's global hazards from @ukhsa.bsky.social - 17th June 2026: 💦 #floods in Afghanistan & Canada 🌪️ #tornados hits central USA & Guangxi/China ⛈️ storms affect Vietnam & central/easterm USA www.met.reading.ac.uk/~sgs02rpa/ex...

Image showing destroyed buildings viewed by a young Afghan as floods, heavy rainfall and landslides batter Afghanistan. Credit: AZERTAC via watchers.news

Richard Allan@rpallanuk· Jun 15

Showery then record #heatwave in May 2026 over UK ending another dry spring with low river flows, dry soils mostly in south & variable groundwater, with temporary respite in an early wet June based on @ukceh.bsky.social assessment: nrfa.ceh.ac.uk/sites/defaul...

Map showing low rainfall over much of UK in May & spring 2026

Map showing low river flows over much of UK in May 2026

Map showing variable groundwater across UK in May 2026

Map showing dry soils over southern UK in May 2026

Richard Allan@rpallanuk· Jun 11

The global assessment of climate change indicators is updated to 2025: essd.copernicus.org/articles/18/... In a @uk.theconversation.com blog, focus is on rising energy imbalance as the gap between absorbed sunlight by the planet and infrared heat loss is growing: theconversation.com/earths-energ...

Figure 7 of Forster et al. 2026 showing an increasing rate of global heating

Richard Allan@rpallanuk· Jun 3

Global hazards from @ukhsa.bsky.social 3rd June 2026: 💭 dust storms engulf northeast China ⛈️ storms hit Vietnam 💦 #flooding in Thailand & Tennessee/USA www.met.reading.ac.uk/~sgs02rpa/ex...

Major dust storm in Harbin, Heilongjiang on May 31, 2026. Credit: Yangyubin1

Richard Allan@rpallanuk· May 27

There's more energy arriving than leaving Earth due to rising greenhouse gas levels and this is warming #climate & this energy imbalance is growing - a new study led by Herve Douville uses an observed reconstruction to infer this trend will not reverse before the early 2040s: doi.org/10.1029/2025...

Figure 1 of Douville & Allan (2026) - see paper for details

Richard Allan@rpallanuk· May 27

Global #climate hazards @ukhsa.bsky.social 27 May 2026: 🌡️ #heatwave grips western Europe, northern India & Pakistan 💦 #flooding affects Afghanistan www.met.reading.ac.uk/~sgs02rpa/ex...

Flames and smoke rise from a fire close to the ruins of St Anthony's Chapel in Holyrood Park near Arthur's Seat in Edinburgh, Scotland, on Monday May 25, 2026. Jane Barlow/PA via CNN

Richard Allan@rpallanuk· May 21

Research provides evidence that fossil fuel companies’ deployment of renewable energy, biofuels, carbon capture and storage (CCS), green hydrogen & carbon offsetting isn’t designed to oppose decarbonisation, but to manage the conversation around renewables: theconversation.com/we-reviewed-...

Map of world showing the location of 48 projects assessed by the authors

Richard Allan@rpallanuk· May 20

Global #climate hazards @ukhsa.bsky.social 20th May 2026: 💦 #flooding across Turkiye, southern China, India, Sri Lanka ⛈️ Storms hit Vietnam 🏔️ Avalanche in Nepal 🥀 deficient rainy season heightens food insecurity in Somalia #wildfire Colorado/USA www.met.reading.ac.uk/~sgs02rpa/ex...

Person being rescued in boat in flooded street [Image credit: CCTV]

Richard Allan@rpallanuk· May 18

It was a dry April over much of the UK, particularly in the south & east and the @ukceh.bsky.social hydrological outlook indicates current below normal river flows in southern/central England are likely to persist into summer without significant rainall: nrfa.ceh.ac.uk/sites/defaul...

Map showing rainfall well below average over much of England and Wales with normal amounts over Northern Ireland and Scotland

Richard Allan@rpallanuk· May 16

Cole Museum @uniofreading.bsky.social before getting down to business at the community festival

Richard Allan@rpallanuk· May 13

Global #climate hazards @ukhsa.bsky.social 13th May 2026: 💦 #floods & landslides affect Indonesia, South Africa & Somalia ⛈️ storms strike Nepal & Pakistan 🌪️ Tornadoes hit Mississippi/USA www.met.reading.ac.uk/~sgs02rpa/ex...

A woman walks on a waterlogged pathway of the informal settlement in Khayelitsha, on the outkirks of Cape Town, South Africa, Tuesday, May 12, 2026. (AP Photo/Bheki Radebe)

Richard Allan@rpallanuk· May 7

Contrasting the synoptic drivers of the UK #heatwaves of 1976, 2003, 2018 and 2022 - great work from Nedim Sladić to write up the dissertation written while studying @unirdg-met.bsky.social! doi.org/10.1002/wea....

Soil moisture in the 0–7cm layer across Europe and the North Atlantic during meteorological spring and summer (MAM and JJA seasons) relative to the 1961–1990 reference period, with stipples indicating anomalies below the two standard deviations (the 95th percentile category). (a) 1976, (b) 2003, (c) 2018, (d) 2022. (Source: ERA5)

Richard Allan@rpallanuk· May 6

Global #climate hazards @ukhsa.bsky.social 6 May 2026: 💦 #floods & landslides over Tajikistan, Afghanistan, DR Congo & Brazil ⛈️ storms hit Türkiye & Viet Nam 🌡️ #heatwave grips Pakistan 🌋 volcanic ash affects Philippines www.met.reading.ac.uk/~sgs02rpa/ex...

[Satellite image showing thick cloud bands over Brazil at 12:50 UTC on May 1, 2026. Credit: NOAA/GOES-East, Zoom Earth, The Watchers]

Richard Allan@rpallanuk· May 1

Global #climate hazards @ukhsa.bsky.social 1st May 2026: 💦 #floods impact Kenya, Somalia, Yemen, Afghanistan, Indonesia & Brazil ⛈️ storms strike Ukraine, Bangladesh, Vietnam & USA ❄️ snow affects Russia www.met.reading.ac.uk/~sgs02rpa/ex...

severe weather in ukraine depicted in an image of a broken tree strewn across a wet road via unn.ua

Richard Allan@rpallanuk· Apr 29

Condensation trails (contrails) from aircraft produce a greenhouse heating effect only partially offset by their solar shading cooling & this dominates their warming influence on climate in the short term while their CO2 emissions leave a lasting legacy of heating theconversation.com/heres-what-w...

picture of extensive contrail formation in March 2009 following an aircraft manoeuvre through a contrail forming region over the North Sea highlighted by Haywood et al. (2009) JGR https://doi.org/10.1029/2009JD012650

Richard Allan@rpallanuk· Apr 24

Global #climate hazards @ukhsa.bsky.social 23rd Apr 2026: 💦 #floods & landslides across Ecuador, DR Congo, Vietnam & New Zealand ⛈️ storms hit Thailand, Bangladesh & Bulgaria www.met.reading.ac.uk/~sgs02rpa/ex...

Image showing aftermath of flooding in New Zealand with footage showing vehicles submerged, trees uprooted, houses hit by landslides [Porirua City Council via BBC]

Richard Allan@rpallanuk· Apr 17

Global #climate hazards @ukhsa.bsky.social 17 Apr 2026: 💦 #floods in Turkey, Afghanistan, DR Congo, Dominican Republic, Haiti, Panama, Ecuador, Indonesia ⛈️ storms hit NE India, Italy 🌪️ tornado in Kansas, USA www.met.reading.ac.uk/~sgs02rpa/ex...

View from above flood and landslide in Ecuador April 15th 2026, Image credit: Presidencia de Ecuador

Richard Allan@rpallanuk· Apr 9

Global #climate hazards @ukhsa.bsky.social 9th April 2026: 💦 #floods across Afghanistan, Azerbaijan, Indonesia, Dominican Republic, Angola, DR Congo ⛈️ storms hit India & Pakistan 🌀 Tropical Cyclone MAILA hits Solomon Islands www.met.reading.ac.uk/~sgs02rpa/ex...

Residents inspect a building that partially collapsed due to heavy flooding in Jalalabad, Afghanistan, Saturday, April 4, 2026. (AP Photo/Wahidullah Kakar)

Richard Allan@rpallanuk· Apr 9

African Humid Period (AHP) punctuated by decadal-scale #droughts with an event 8.2 thousand years ago linked to fresh water influx that weakened the Atlantic Meridional Overturning Circulation (AMOC) based on high resolution paleoclimate observations & modelling @nature.com doi.org/10.1038/s415...

Fig.1 showing map of Lake Yoa in northern Africa

Figure 3 showing lots of palaeo-timeseries over past 10,000 years

Richard Allan@rpallanuk· Apr 2

Global #climate hazards @ukhsa.bsky.social: 🐪 duststorm NW Africa 💦 #floods DR Congo, Malawi/Tanzania/Mozambique/Kenya, Yeman/Oman, Iraq, Afghanistan/Pakistan, Papua New Guinea, Peru/Ecuador ⛈️ storms Liberia, Croatia, VIetnam 🏔️ avalanches N India 🔥 #wildfire USA www.met.reading.ac.uk/~sgs02rpa/ex...