diff --git a/package.json b/package.json
index 875e08a..4a445bb 100644
--- a/package.json
+++ b/package.json
@@ -279,4 +279,4 @@
     }
   },
   "packageManager": "yarn@4.5.3"
-}
\ No newline at end of file
+}
diff --git a/src/hooks/useRadarData.js b/src/hooks/useRadarData.js
new file mode 100644
index 0000000..5de2453
--- /dev/null
+++ b/src/hooks/useRadarData.js
@@ -0,0 +1,27 @@
+import { useLazyQuery } from "@apollo/client";
+import { useCallback } from "react";
+import { RADAR_PEOPLE_COUNT_QUERY } from "~/scenes/SendAlert/gql";
+
+export default function useRadarData() {
+  const [fetchRadarData, { data, loading: isLoading, error }] = useLazyQuery(
+    RADAR_PEOPLE_COUNT_QUERY,
+    {
+      fetchPolicy: "network-only", // Always fetch fresh data
+      errorPolicy: "all",
+    },
+  );
+
+  const reset = useCallback(() => {
+    // Reset is handled by not calling the query again
+    // Apollo will manage the state internally
+  }, []);
+
+  return {
+    data: data?.getOneRadarPeopleCount,
+    isLoading,
+    error,
+    fetchRadarData,
+    reset,
+    hasLocation: true, // Location is now handled server-side via authentication
+  };
+}
diff --git a/src/scenes/SendAlert/NotificationsButton.js b/src/scenes/SendAlert/NotificationsButton.js
index 5a97269..19299f4 100644
--- a/src/scenes/SendAlert/NotificationsButton.js
+++ b/src/scenes/SendAlert/NotificationsButton.js
@@ -6,7 +6,7 @@ import { createStyles } from "~/theme";
 import Text from "~/components/Text";
 import { MaterialIcons } from "@expo/vector-icons";
 
-export default function NotificationsButton() {
+export default function NotificationsButton({ flex = 1 }) {
   const navigation = useNavigation();
   const { hasRegisteredRelatives } = useParamsState(["hasRegisteredRelatives"]);
   const { newCount } = useNotificationsState(["newCount"]);
@@ -50,9 +50,11 @@ export default function NotificationsButton() {
   const styles = useStyles();
 
   return (
-    <View>
+    <View style={{ flex }}>
       <TouchableOpacity
         style={styles.button}
+        accessibilityLabel={hasNewNotifications ? `Notifications - ${newCount} nouvelles notifications` : "Notifications"}
+        accessibilityRole="button"
         onPress={() => navigation.navigate("Notifications")}
       >
         <MaterialIcons
@@ -86,12 +88,13 @@ const useStyles = createStyles(({ theme: { colors } }) => ({
   button: {
     flexDirection: "row",
     alignItems: "center",
-    alignSelf: "flex-end",
+    alignSelf: "stretch",
     marginTop: 10,
     marginBottom: 10,
     backgroundColor: colors.surface,
     borderRadius: 8,
-    width: "100%",
+    flex: 1,
+    minHeight: 48, // Consistent with RadarButton for accessibility
     paddingVertical: 12,
     paddingHorizontal: 16,
     shadowColor: colors.text,
diff --git a/src/scenes/SendAlert/RadarButton.js b/src/scenes/SendAlert/RadarButton.js
new file mode 100644
index 0000000..605c223
--- /dev/null
+++ b/src/scenes/SendAlert/RadarButton.js
@@ -0,0 +1,57 @@
+import React from "react";
+import { View } from "react-native";
+import { IconButton } from "react-native-paper";
+import { MaterialCommunityIcons } from "@expo/vector-icons";
+import { createStyles } from "~/theme";
+
+export default function RadarButton({ onPress, isLoading = false, flex = 0.22 }) {
+  const styles = useStyles();
+
+  return (
+    <View style={[styles.container, { flex }]}>
+      <IconButton
+        accessibilityLabel="Radar - Voir les utilisateurs Alerte-Secours prêts à porter secours aux alentours"
+        mode="contained"
+        size={24}
+        style={styles.button}
+        onPress={onPress}
+        disabled={isLoading}
+        icon={({ size, color }) => (
+          <MaterialCommunityIcons
+            name="radar"
+            size={size}
+            color={color}
+            style={styles.icon}
+          />
+        )}
+      />
+    </View>
+  );
+}
+
+const useStyles = createStyles(({ wp, hp, theme: { colors, custom } }) => ({
+  container: {
+    alignItems: "center",
+    justifyContent: "center",
+    marginTop: 10,
+    marginBottom: 10,
+    flex: 1, // Stretch to fill available space
+  },
+  button: {
+    backgroundColor: colors.primary,
+    elevation: 4,
+    shadowColor: "#000",
+    shadowOffset: {
+      width: 0,
+      height: 2,
+    },
+    shadowOpacity: 0.25,
+    shadowRadius: 3.84,
+    minHeight: 48, // Match minimum touch target height
+    width: "100%",
+    maxWidth: 48, // Keep it square for radar button
+  },
+  icon: {
+    color: colors.onPrimary,
+  },
+}));
diff --git a/src/scenes/SendAlert/RadarModal.js b/src/scenes/SendAlert/RadarModal.js
new file mode 100644
index 0000000..c56309d
--- /dev/null
+++ b/src/scenes/SendAlert/RadarModal.js
@@ -0,0 +1,176 @@
+import React from "react";
+import { View, Text } from "react-native";
+import { Modal, Portal, Button, ActivityIndicator } from "react-native-paper";
+import { MaterialCommunityIcons } from "@expo/vector-icons";
+import { createStyles, useTheme } from "~/theme";
+
+export default function RadarModal({
+  visible,
+  onDismiss,
+  peopleCount = null,
+  isLoading = false,
+  error = null,
+}) {
+  const { colors } = useTheme();
+  const styles = useStyles();
+
+  const renderContent = () => {
+    if (isLoading) {
+      return (
+        <View style={styles.loadingContainer}>
+          <ActivityIndicator size="large" color={colors.primary} />
+          <Text style={styles.loadingText}>
+            Recherche d'utilisateurs Alerte-Secours disponibles aux alentours...
+          </Text>
+        </View>
+      );
+    }
+
+    if (error) {
+      return (
+        <View style={styles.errorContainer}>
+          <MaterialCommunityIcons
+            name="alert-circle"
+            size={48}
+            color={colors.error}
+          />
+          <Text style={styles.errorTitle}>Erreur</Text>
+          <Text style={styles.errorText}>
+            Impossible de récupérer les informations. Vérifiez votre connexion
+            et votre localisation.
+          </Text>
+        </View>
+      );
+    }
+
+    if (peopleCount !== null) {
+      return (
+        <View style={styles.successContainer}>
+          <Text style={styles.countText}>{peopleCount}</Text>
+          <Text style={styles.descriptionText}>
+            {peopleCount === 0
+              ? "Aucun utilisateur d'Alerte-Secours disponible pour assistance dans un rayon de 25 km"
+              : peopleCount === 1
+              ? "utilisateur d'Alerte-Secours prêt à porter secours dans un rayon de 25 km"
+              : "utilisateurs d'Alerte-Secours prêts à porter secours dans un rayon de 25 km"}
+          </Text>
+        </View>
+      );
+    }
+
+    return null;
+  };
+
+  return (
+    <Portal>
+      <Modal
+        visible={visible}
+        onDismiss={onDismiss}
+        contentContainerStyle={[
+          styles.modalContainer,
+          { backgroundColor: colors.surface },
+        ]}
+      >
+        <View style={styles.modalHeader}>
+          <MaterialCommunityIcons
+            name="radar"
+            size={32}
+            color={colors.primary}
+            style={styles.modalIcon}
+          />
+          <Text style={styles.modalTitle}>Utilisateurs aux alentours</Text>
+        </View>
+
+        <View style={styles.content}>
+          {renderContent()}
+
+          <View style={styles.buttonContainer}>
+            <Button
+              mode="contained"
+              onPress={onDismiss}
+              style={styles.closeButton}
+            >
+              Fermer
+            </Button>
+          </View>
+        </View>
+      </Modal>
+    </Portal>
+  );
+}
+
+const useStyles = createStyles(({ wp, hp, scaleText, theme: { colors } }) => ({
+  modalContainer: {
+    margin: wp(5),
+    borderRadius: 8,
+    padding: wp(5),
+    elevation: 5,
+  },
+  content: {
+    alignItems: "center",
+  },
+  loadingContainer: {
+    alignItems: "center",
+    paddingVertical: hp(3),
+  },
+  loadingText: {
+    ...scaleText({ fontSize: 16 }),
+    color: colors.onSurface,
+    marginTop: hp(2),
+  },
+  errorContainer: {
+    alignItems: "center",
+    paddingVertical: hp(2),
+  },
+  errorTitle: {
+    ...scaleText({ fontSize: 18 }),
+    fontWeight: "bold",
+    color: colors.error,
+    marginTop: hp(1),
+    marginBottom: hp(1),
+  },
+  errorText: {
+    ...scaleText({ fontSize: 14 }),
+    color: colors.onSurface,
+    textAlign: "center",
+    lineHeight: 20,
+  },
+  successContainer: {
+    alignItems: "center",
+    paddingVertical: hp(2),
+  },
+  countText: {
+    ...scaleText({ fontSize: 36 }),
+    fontWeight: "bold",
+    color: colors.primary,
+    marginTop: hp(1),
+  },
+  descriptionText: {
+    ...scaleText({ fontSize: 16 }),
+    color: colors.onSurface,
+    textAlign: "center",
+    marginTop: hp(1),
+  },
+  buttonContainer: {
+    marginTop: hp(3),
+    width: "100%",
+  },
+  closeButton: {
+    borderRadius: 8,
+  },
+  modalHeader: {
+    flexDirection: "row",
+    alignItems: "center",
+    justifyContent: "center",
+    marginBottom: hp(2),
+  },
+  modalIcon: {
+    marginRight: wp(2),
+  },
+  modalTitle: {
+    ...scaleText({ fontSize: 20 }),
+    fontWeight: "bold",
+    color: colors.onSurface,
+    textAlign: "center",
+  },
+}));
diff --git a/src/scenes/SendAlert/TopButtonsBar.js b/src/scenes/SendAlert/TopButtonsBar.js
new file mode 100644
index 0000000..67a9c0d
--- /dev/null
+++ b/src/scenes/SendAlert/TopButtonsBar.js
@@ -0,0 +1,21 @@
+import React from "react";
+import { View } from "react-native";
+import { createStyles } from "~/theme";
+
+export default function TopButtonsBar({ children }) {
+  const styles = useStyles();
+
+  return <View style={styles.container}>{children}</View>;
+}
+
+const useStyles = createStyles(({ wp, hp }) => ({
+  container: {
+    flexDirection: "row",
+    alignItems: "stretch", // Ensures both buttons have same height
+    justifyContent: "space-between",
+    marginTop: hp(1),
+    marginBottom: hp(1),
+    gap: wp(3), // Slightly more space between the buttons
+    minHeight: 48, // Minimum touch target height for accessibility
+  },
+}));
\ No newline at end of file
diff --git a/src/scenes/SendAlert/gql.js b/src/scenes/SendAlert/gql.js
new file mode 100644
index 0000000..351a6e3
--- /dev/null
+++ b/src/scenes/SendAlert/gql.js
@@ -0,0 +1,9 @@
+import { gql } from "@apollo/client";
+
+export const RADAR_PEOPLE_COUNT_QUERY = gql`
+  query radarPeopleCount {
+    getOneRadarPeopleCount {
+      count
+    }
+  }
+`;
diff --git a/src/scenes/SendAlert/index.js b/src/scenes/SendAlert/index.js
index 75790a7..72eae35 100644
--- a/src/scenes/SendAlert/index.js
+++ b/src/scenes/SendAlert/index.js
@@ -13,6 +13,10 @@ import HelpBlock from "./HelpBlock";
 import RegisterRelativesButton from "./RegisterRelativesButton";
 import NotificationsButton from "./NotificationsButton";
 import ContributeButton from "./ContributeButton";
+import RadarButton from "./RadarButton";
+import RadarModal from "./RadarModal";
+import TopButtonsBar from "./TopButtonsBar";
+import useRadarData from "~/hooks/useRadarData";
 
 export default function SendAlert() {
   const navigation = useNavigation();
@@ -20,10 +24,35 @@ export default function SendAlert() {
   const styles = useStyles();
 
   const [helpVisible, setHelpVisible] = useState(false);
+  const [radarModalVisible, setRadarModalVisible] = useState(false);
+
+  const {
+    data: radarData,
+    isLoading: radarIsLoading,
+    error: radarError,
+    fetchRadarData,
+    reset: resetRadarData,
+    hasLocation,
+  } = useRadarData();
+
   function toggleHelp() {
     setHelpVisible(!helpVisible);
   }
 
+  const handleRadarPress = useCallback(() => {
+    if (!hasLocation) {
+      // Could show a location permission alert here
+      return;
+    }
+    setRadarModalVisible(true);
+    fetchRadarData();
+  }, [hasLocation, fetchRadarData]);
+
+  const handleRadarModalClose = useCallback(() => {
+    setRadarModalVisible(false);
+    resetRadarData();
+  }, [resetRadarData]);
+
   const navigateTo = useCallback(
     (navOpts) =>
       navigation.dispatch({
@@ -70,7 +99,14 @@ export default function SendAlert() {
   return (
     <ScrollView>
       <View style={styles.container}>
-        <NotificationsButton />
+        <TopButtonsBar>
+          <NotificationsButton flex={0.78} />
+          <RadarButton
+            onPress={handleRadarPress}
+            isLoading={radarIsLoading}
+            flex={0.22}
+          />
+        </TopButtonsBar>
 
         <View style={styles.head}>
           <Title style={styles.title}>Quelle est votre situation ?</Title>
@@ -218,6 +254,14 @@ export default function SendAlert() {
         </View>
 
         <ContributeButton />
+
+        <RadarModal
+          visible={radarModalVisible}
+          onDismiss={handleRadarModalClose}
+          peopleCount={radarData?.count}
+          isLoading={radarIsLoading}
+          error={radarError}
+        />
       </View>
     </ScrollView>
   );