joining us now, climatologist at the western regional center, also helped author the u.s. drought monitor, and this week's nap, good afternoon, david, thank you so much for your time. the difference between severe drought and extreme drought which is what we have now, talk about what that difference means. >> yeah, thank you. the categorization that we use is based onbased onbased onbasen rankings. so when we are looking at various data indicators, such as precipitation, temperature, soil moisture, looking at the snow pack and andck andck andcka we are looking at percentile rankings of the data, and what that does is provide a historical context to the data indicators. looking at the indicators recently this week, as i was doing the analysis, much of the state fell into that extreme drought category. >> nothing changed in the last two weeks, right? was the production always going to be that we were going to get into this exceptional area, actually no, that is the next level, let's hope we don't get there, we are at extreme. what change, if anything? >> yeah, so we were on

tuesday, the first day ofjune, the first day of summer according to climatologists, not a bad stab atshine, getting warmer, temperatures 25 celsius. chance of a shower moving into northern ireland. later in the week, an area of low pressure will move up from iberia. that brings the risk of a view thundery showers. still for most of us on wednesday to strike with sunshine and it will be even hotter. we will start to see some of these thundery downpours form across western and southern areas. temperatures, 26 celsius in london, the hottest day of the year so far, not far behind that, liverpool, glasgow, 22. lots of sunshine, on the warm side, thundery showers developed from mid week will ease those temperatures down a few degrees. this is bbc news with mejane hill. the latest headlines... calls for the uk government to have an open debate with the public about restriction easing plans onjune the 21st. the group that represents nhs trusts in england warns of the pressures being faced by hospitals. we think there are significant numbers of people who have put off coming into hospital and

climatologist david simmerol helped author this new map. >> the past 24-month period has been the third driest statewide on record. for the bay area, it was the driest 24-month period on record. >> the conditions have already prompted voluntary conservation measures in parts of the bay area. sandy mattel is here with more on the conditions that the map highlights. and it's really dire. >> it is indeed. very disturbing to see this image. let me show you. the entire state of california is in the drought. extreme drought covering most of california. that's the second highest level. some parts are in exceptional drought. the entire bay area under extreme drought. it's been months in the making. 13% of average statewide. and our rainfall for the season, look at this. we're less than half of where we should be for this time of year. 38% of average in san francisco. oakland 42. and less than that from san jose to santa rosa to san francisco. april and may we usually get a lot of rain. i don't know see any rain in rainn forecast. fire danger will be rising. i'll be back with that in just a few

noaa released our new normal, the census data but for meteorologists and climatologists.an see there north dakota, south dakota, eastern montana and western minnesota, however, look at this from 1901 that top left map all the way to today when we compare the 30-year normals we have seen significant rise in temperatures especially in the last 40 years, i'll leave you with that final map to compare over the last century and there's much more information online. >>> >>> good morning, welcome to wednesday >>> on mother's day we celebrate the love and support our moms have given us. it's something olympic champion and track and field star allyson felix knows a lot about hen credits her mom for helping her. this segment is sponsored by p & g and how allyson wants to spread a message of hope for all. take a look. >> a six-time olympic gold medalist she is a track and field superstar. >> felix swerves into the front. >> reporter: with 13 world champion titles she's even surpassed usain bolt as any athlete in history. >> i love to run. i'm so motivated. dedicated and i still feel